USPTO Examiner CHOUDHURY MUSTAK - Art Unit 2872

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19264544APPARATUSES, SYSTEMS AND METHODS FOR SOLID IMMERSION MENISCUS LENSESJuly 2025January 2026Allow710YesNo
19183480SYSTEM AND METHOD OF CREATING A LAYERED OPTICAL DEVICEApril 2025June 2025Allow200NoNo
19172508VIEWING OPTIC WITH AN INTEGRATED DISPLAY SYSTEMApril 2025February 2026Allow1110NoNo
19118626OPTICAL SYSTEM WITH CROSS TRACK ERROR REDUCTIONApril 2025November 2025Allow710YesNo
19087200APPARATUS AND METHOD FOR CONFOCAL OBSERVATION OF A SAMPLEMarch 2025January 2026Allow1020NoNo
19108748ORTHOKERATOLOGY CONTACT LENSES AND RELATED METHODSMarch 2025May 2025Allow300NoNo
19016684FLOW CELL DEVICES AND OPTICAL SYSTEMS FOR NUCLEIC ACID SEQUENCINGJanuary 2025August 2025Allow701NoNo
18830986ASTIGMATISM CORRECTING CONTACT LENSESSeptember 2024July 2025Allow1120YesNo
18812680DARK-FIELD CONFOCAL MICROSCOPY MEASUREMENT APPARATUS AND METHOD BASED ON TIME-VARYING FRACTIONAL-ORDER VORTEX DEMODULATIONAugust 2024November 2024Allow300NoNo
18796717SYSTEM FOR MICROSCOPY SLIDE LOCKING USING A SWIVEL MECHANISM AND METHOD OF USE THEREOFAugust 2024October 2024Allow200NoNo
18778027MYOPIA OCULAR PREDICTIVE TECHNOLOGY AND INTEGRATED CHARACTERIZATION SYSTEMJuly 2024September 2024Allow200NoNo
18717368OPTICAL FILM, IMAGE DISPLAY PANEL, AND IMAGE DISPLAY DEVICEJune 2024September 2025Allow1620YesNo
18662722Glasses with Selectively Adjustable Optical Power LensesMay 2024January 2026Allow2010NoNo
18661758Screening Apparatus and MethodMay 2024March 2026Abandon2210NoNo
18648283SLIDE IMAGING APPARATUSApril 2024June 2025Allow1310YesNo
18643220MODULAR FRAME SYSTEM FOR GLASSESApril 2024August 2025Allow1610NoNo
18633724LENS MOVING APPARATUS AND CAMERA MODULE INCLUDING THE SAMEApril 2024August 2025Allow1600NoNo
18613697VIEWING OPTIC WITH AN INTEGRATED DISPLAY SYSTEMMarch 2024December 2024Allow810NoNo
18690276CONTACT LENSMarch 2024September 2024Allow710NoNo
18428799OPTICAL IMAGING SYSTEMJanuary 2024February 2025Allow1210NoNo
18424711DIFFERENTIAL DARK-FIELD CONFOCAL MICROSCOPIC MEASUREMENT APPARATUS AND METHOD BASED ON POLARIZED VECTOR LIGHT BEAMJanuary 2024August 2024Allow700YesNo
18407043FOLDED LENS SYSTEMJanuary 2024November 2025Allow2200NoNo
18392789High Numerical Aperture Selective Plane Illumination MicroscopyDecember 2023July 2025Allow1920NoNo
18390145MODULAR FRAME SYSTEM FOR GLASSESDecember 2023March 2024Allow310NoNo
18391406SYSTEMS AND METHODS FOR ALIGNMENT OF THE EYE FOR OCULAR IMAGINGDecember 2023February 2026Allow2610NoNo
18500859SEALED FLUORESCENCE MICROSCOPE WITH CONSTANT BEAM PATHNovember 2023March 2026Allow2810NoNo
18499210DISPLAY DEVICE AND MANUFACTURING METHOD THEREOFNovember 2023February 2026Allow2810NoNo
18499755IMAGING MODULE BEARING DEVICE AND BASE, MICROSCOPIC IMAGE ACQUISITION DEVICE AND ADJUSTING METHODNovember 2023March 2026Allow2910NoNo
18385515Electronic Focal Adjustment System for Night Vision DevicesOctober 2023December 2024Allow1310NoNo
18495397OPTICAL DEVICEOctober 2023February 2026Allow2810YesNo
18371600SURGICAL MICROSCOPE SYSTEMSeptember 2023December 2025Allow2710NoNo
18460210TRACKING MOVEMENT OF AN EYE WITHIN A TRACKING RANGESeptember 2023February 2025Allow1700NoNo
18452846OUTER MIRRORAugust 2023December 2025Allow2810NoNo
18546247SLIDE HOLDER AND SLIDE-HOLDER SUPPORT STRUCTUREAugust 2023February 2026Allow3010NoNo
18448120MICROSCOPIC IMAGING SYSTEMSAugust 2023March 2026Allow3110NoNo
18361809MICROSCOPIC DEVICES AND FOCUSING METHODS THEREOFJuly 2023February 2026Allow3010NoNo
18220871METHOD AND APPARATUS FOR HIGH-RESOLUTION LOCALIZATION OF A SINGLE EMITTER IN MULTIPLE SPATIAL DIRECTIONSJuly 2023September 2025Allow2600NoNo
18349003ROTATING MECHANISM OF GLASSES, GLASSES, AND SMART GLASSESJuly 2023December 2025Allow2910NoNo
18345701Intraoral scanner with optical system for minimizing stray lightJune 2023December 2025Allow3010NoNo
18258315SIMULTANEOUS FOCUSING OF AN OPTICAL SYSTEM TO MULTIPLE FOCAL PLANES USING LIQUID CRYSTAL POLARIZATION LENSESJune 2023February 2024Allow810YesNo
18207958Objective Attachment for a Microscope Objective and Apparatus for Feeding and/or Removing an Immersion LiquidJune 2023February 2026Allow3210NoNo
18265640CONFOCAL MICROSCOPE WITH PHOTON RE-ALLOCATIONJune 2023October 2025Allow2910YesNo
18330010STICK ON DEVICES USING PERIPHERAL DEFOCUS TO TREAT PROGRESSIVE REFRACTIVE ERRORJune 2023May 2024Allow1210YesNo
18205567OPTICAL FILM AND BACKLIGHT MODULEJune 2023February 2026Abandon3210NoNo
18322582SUPER-RESOLUTION MICROSCOPIC IMAGING METHOD AND APPARATUS BASED ON COMMON-PATH PARALLEL FLUORESCENCE EMISSION DIFFERENCE MICROSCOPYMay 2023July 2025Allow2600NoNo
18144372INTERFEROMETRIC SCATTERING MICROSCOPYMay 2023August 2024Allow1610NoNo
18311844Methods for Fabricating Optical WaveguidesMay 2023January 2025Allow2110YesNo
18309319Apparatus Providing Repeatable Registration by Aligning Objects to be ImagedApril 2023November 2025Allow3110YesNo
18139870SHAPE DISCRIMINATION VISION ASSESSMENT AND TRACKING SYSTEMApril 2023March 2025Allow2310YesNo
18301859ASTIGMATISM CORRECTING CONTACT LENSESApril 2023March 2026Allow3510NoNo
18129574VIEWING OPTIC WITH AN INTEGRATED DISPLAY SYSTEMMarch 2023November 2023Allow810YesNo
18189018OPEN-TOP LIGHT-SHEET MICROSCOPY WITH A NON-ORTHOGONAL ARRANGEMENT OF ILLUMINATION AND COLLECTION OBJECTIVESMarch 2023June 2025Allow2710NoNo
18179088Continuous Zoom Stereoscopic Microscope with Adjustable Stereoscopic AngleMarch 2023September 2025Allow3110NoNo
18175452POLARIZED MICROSCOPE AND INTRA IMAGE FIELD CORRECTION ANALYSIS METHODFebruary 2023October 2025Allow3210YesNo
18018331Method for Detecting Emission Light, Detection Device and Laser Scanning MicroscopeJanuary 2023October 2023Allow910NoNo
18158582METHOD OF CALIBRATING A SYSTEM FOR READING BIREFRINGENT DATAJanuary 2023October 2025Allow3310YesNo
18017418METHOD AND ILLUMINATION DEVICE OF THE ADAPTIVE OPTICS IN TRANSMISSION OR REFLECTION MICROSCOPYJanuary 2023September 2025Allow3110NoNo
18016388METHOD, DEVICE, MICROSCOPE AND COMPUTER PROGRAM FOR ESTIMATING A POSITION OF AN EMITTER IN A SAMPLEJanuary 2023November 2025Abandon3410NoNo
18014175METHOD COMPRISING DETERMINING A QUANTITATIVE DISPERSION IMAGE OF AN OBJECT AND DIGITAL IN-LINE HOLOGRAM MICROSCOPE SCANNERJanuary 2023December 2025Allow3610NoNo
18149049USING FLIM FOR BIOPSY BEFORE CHEMICAL FIXATIONDecember 2022September 2025Allow3310NoNo
18085801OBSERVATION APPARATUS AND METHOD OF VISUALIZING PHASE OBJECTDecember 2022August 2025Allow3210NoNo
18010789A METHOD FOR OBTAINING AN OPTICALLY-SECTIONED IMAGE OF A SAMPLE, AND A DEVICE SUITABLE FOR USE IN SUCH A METHODDecember 2022October 2025Allow3410NoNo
18082370COUPLERS FOR OPTICAL DEVICES WITH COAXIAL ILLUMINATION FOR REFLECTED LIGHT AND FLUORESCENCE DETECTION AND METHODS FOR USEDecember 2022August 2023Allow810YesNo
18075393Apparatus, Optical system, and Method for digital holographic and polarization microscopyDecember 2022December 2025Abandon3710NoNo
18008442IMAGE OBSERVATION APPARATUS AND LIGHTING OPTICAL SYSTEM THEREOFDecember 2022September 2023Allow910YesNo
18008094DIRECTING LIGHT INTO AN OPTICAL FIBERDecember 2022April 2025Allow2900NoNo
18060139MULTIFOCAL CONTACT LENS DISPLAYING IMPROVED VISION ATTRIBUTESNovember 2022April 2024Allow1611NoNo
18056984EUV PHOTOMASK INSPECTION APPARATUSNovember 2022August 2025Allow3210YesNo
17985344SURGICAL MICROSCOPE SYSTEMNovember 2022June 2023Allow700YesNo
18051309ELECTROCHROMIC NICKEL OXIDE SIMULTANEOUSLY DOPED WITH LITHIUM AND A METAL DOPANTOctober 2022January 2025Allow2610YesNo
17915111LIGHT SHEET MICROSCOPE AND METHOD FOR MANIPULATING A TARGET AREA OF A SAMPLESeptember 2022July 2025Allow3310YesNo
17935187VEHICULAR CAMERA AND LENS ASSEMBLYSeptember 2022April 2025Allow3010NoNo
17914368OPTICAL ASSEMBLY FOR AN INCLINED-PLANE MICROSCOPE FOR IMPROVING THE RESOLUTIONSeptember 2022March 2025Allow3000NoNo
17940477SCREENING APPARATUS AND METHODSeptember 2022February 2024Allow1710NoNo
17823208STICK ON DEVICES USING PERIPHERAL DEFOCUS TO TREAT PROGRESSIVE REFRACTIVE ERRORAugust 2022March 2023Allow610YesNo
17822718SEGMENTED ILLUMINATION AND POLARIZATION DEVICES FOR TUNABLE OPTICAL METASURFACESAugust 2022May 2023Allow910NoNo
17800082DEVICES AND/OR METHODS FOR INSPECTING AND/OR ILLUMINATING A HUMAN EYEAugust 2022December 2023Allow1610YesNo
17794317OPHTHALMIC INFORMATION PROCESSING APPARATUS, OPHTHALMIC APPARATUS, OPHTHALMIC INFORMATION PROCESSING METHOD, AND RECORDING MEDIUMJuly 2022July 2025Allow3610NoNo
17865850Specimen Machining Device and Specimen Machining MethodJuly 2022July 2025Allow3610NoNo
17791736HEAD-MOUNTED DISPLAY AND VIRTUAL IMAGE FORMING LENS TO BE USED FOR THE HEAD-MOUNTED DISPLAYJuly 2022July 2025Allow3610NoNo
17841036CUSTOMIZABLE ELECTRONIC EYEWEARJune 2022March 2025Allow3310NoNo
17836561MICROSCOPY UNITJune 2022June 2025Allow3610NoNo
17833290Treating Ocular Refractive ErrorJune 2022November 2025Allow4111NoNo
17828978OPTICAL DEVICE HAVING OPTICAL AND MECHANICAL PROPERTIESMay 2022August 2024Allow2620YesNo
17741120EYE EXAMINATION APPARATUS WITH CAMERAS AND DISPLAYMay 2022March 2023Allow1011NoNo
17740012LIGHT SHEET MICROSCOPE HAVING STREAMLINED FIELD OF VIEW CHANGESMay 2022May 2025Allow3610NoNo
17737736OPEN-TOP LIGHT-SHEET MICROSCOPY WITH A NON-ORTHOGONAL ARRANGEMENT OF ILLUMINATION AND COLLECTION OBJECTIVESMay 2022January 2023Allow820YesNo
17660762LENS MOVING APPARATUS AND CAMERA MODULE INCLUDING THE SAMEApril 2022January 2024Allow2010NoNo
17722655SPECTRAL FILTER, AND IMAGE SENSOR AND ELECTRONIC DEVICE INCLUDING SPECTRAL FILTERApril 2022April 2025Allow3610YesNo
17721754APPARATUS, SYSTEM, AND METHOD FOR TESTING AND CALIBRATING IMAGE QUALITY OF FIELD-OF-VIEW DISPLAYS WITH PRESCRIPTION LENSESApril 2022December 2024Allow3200NoNo
17718559OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAMEApril 2022April 2025Allow3610NoNo
17712166GOGGLE LENS SUITABLE FOR GOLFERS TO WEAR ALL-WEATHER AND METHOD OF MANUFACTURING THE SAMEApril 2022August 2022Allow510NoNo
17708733LENS DRIVING DEVICE, CAMERA DEVICE AND ELECTRONIC APPARATUSMarch 2022September 2024Allow3000NoNo
17704466HIGH INDEX LENS INCLUDING UNIAXIAL OR BIAXIAL ORGANIC SOLID MATERIALMarch 2022January 2026Allow4630YesNo
17704067OBJECTIVE OPTICAL SYSTEM, METHOD OF MANUFACTURING OBJECTIVE OPTICAL SYSTEM IMAGE PICKUP APPARATUS, AND ENDOSCOPEMarch 2022February 2025Allow3510NoNo
17702288ARRAY ANTENNA CAPABLE OF SHIFTING PHASE OF LIGHTMarch 2022February 2025Allow3510NoNo
17700775DISPLAY APPARATUS INCLUDING COMBINER HAVING ASYMMETRIC MAGNIFICATIONMarch 2022March 2025Allow3610YesNo
17655496STICK ON DEVICES USING PERIPHERAL DEFOCUS TO TREAT PROGRESSIVE REFRACTIVE ERRORMarch 2022May 2022Allow210NoNo
17641447TUNEABLE OPHTHALMIC LENSMarch 2022December 2022Allow910NoNo
17641772IMPROVED OBLIQUE PLANE MICROSCOPYMarch 2022April 2025Allow3710NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner CHOUDHURY, MUSTAK.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
3
Examiner Affirmed
2
(66.7%)
Examiner Reversed
1
(33.3%)
Reversal Percentile
53.2%
Higher than average

What This Means

With a 33.3% reversal rate, the PTAB reverses the examiner's rejections in a meaningful percentage of cases. This reversal rate is above the USPTO average, indicating that appeals have better success here than typical.

Strategic Value of Filing an Appeal

Total Appeal Filings
21
Allowed After Appeal Filing
10
(47.6%)
Not Allowed After Appeal Filing
11
(52.4%)
Filing Benefit Percentile
76.4%
Higher than average

Understanding Appeal Filing Strategy

Filing a Notice of Appeal can sometimes lead to allowance even before the appeal is fully briefed or decided by the PTAB. This occurs when the examiner or their supervisor reconsiders the rejection during the mandatory appeal conference (MPEP § 1207.01) after the appeal is filed.

In this dataset, 47.6% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is in the top 25% across the USPTO, indicating that filing appeals is particularly effective here. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Strategic Recommendations

Appeals to PTAB show good success rates. If you have a strong case on the merits, consider fully prosecuting the appeal to a Board decision.

Filing a Notice of Appeal is strategically valuable. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Examiner CHOUDHURY, MUSTAK - Prosecution Strategy Guide

Executive Summary

Examiner CHOUDHURY, MUSTAK works in Art Unit 2872 and has examined 725 patent applications in our dataset. With an allowance rate of 84.3%, this examiner has an above-average tendency to allow applications. Applications typically reach final disposition in approximately 29 months.

Allowance Patterns

Examiner CHOUDHURY, MUSTAK's allowance rate of 84.3% places them in the 59% percentile among all USPTO examiners. This examiner has an above-average tendency to allow applications.

Office Action Patterns

On average, applications examined by CHOUDHURY, MUSTAK receive 1.57 office actions before reaching final disposition. This places the examiner in the 30% percentile for office actions issued. This examiner issues fewer office actions than average, which may indicate efficient prosecution or a more lenient examination style.

Prosecution Timeline

The median time to disposition (half-life) for applications examined by CHOUDHURY, MUSTAK is 29 months. This places the examiner in the 65% percentile for prosecution speed. Prosecution timelines are slightly faster than average with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +28.1% benefit to allowance rate for applications examined by CHOUDHURY, MUSTAK. This interview benefit is in the 76% percentile among all examiners. Recommendation: Interviews are highly effective with this examiner and should be strongly considered as a prosecution strategy. Per MPEP § 713.10, interviews are available at any time before the Notice of Allowance is mailed or jurisdiction transfers to the PTAB.

Request for Continued Examination (RCE) Effectiveness

When applicants file an RCE with this examiner, 33.9% of applications are subsequently allowed. This success rate is in the 74% percentile among all examiners. Strategic Insight: RCEs show above-average effectiveness with this examiner. Consider whether your amendments or new arguments are strong enough to warrant an RCE versus filing a continuation.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 53.9% of cases where such amendments are filed. This entry rate is in the 80% percentile among all examiners. Strategic Recommendation: This examiner is highly receptive to after-final amendments compared to other examiners. Per MPEP § 714.12, after-final amendments may be entered "under justifiable circumstances." Consider filing after-final amendments with a clear showing of allowability rather than immediately filing an RCE, as this examiner frequently enters such amendments.

Pre-Appeal Conference Effectiveness

When applicants request a pre-appeal conference (PAC) with this examiner, 160.0% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 91% percentile among all examiners. Strategic Recommendation: Pre-appeal conferences are highly effective with this examiner compared to others. Before filing a full appeal brief, strongly consider requesting a PAC. The PAC provides an opportunity for the examiner and supervisory personnel to reconsider the rejection before the case proceeds to the PTAB.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 86.4% of appeals filed. This is in the 80% percentile among all examiners. Of these withdrawals, 63.2% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner frequently reconsiders rejections during the appeal process compared to other examiners. Per MPEP § 1207.01, all appeals must go through a mandatory appeal conference. Filing a Notice of Appeal may prompt favorable reconsideration even before you file an Appeal Brief.

Petition Practice

When applicants file petitions regarding this examiner's actions, 38.7% are granted (fully or in part). This grant rate is in the 28% percentile among all examiners. Strategic Note: Petitions show below-average success regarding this examiner's actions. Ensure you have a strong procedural basis before filing.

Examiner Cooperation and Flexibility

Examiner's Amendments: This examiner makes examiner's amendments in 0.1% of allowed cases (in the 50% percentile). This examiner makes examiner's amendments more often than average to place applications in condition for allowance (MPEP § 1302.04).

Quayle Actions: This examiner issues Ex Parte Quayle actions in 0.3% of allowed cases (in the 53% percentile). This examiner issues Quayle actions more often than average when claims are allowable but formal matters remain (MPEP § 714.14).

Prosecution Strategy Recommendations

Based on the statistical analysis of this examiner's prosecution patterns, here are tailored strategic recommendations:

  • Prioritize examiner interviews: Interviews are highly effective with this examiner. Request an interview after the first office action to clarify issues and potentially expedite allowance.
  • Consider after-final amendments: This examiner frequently enters after-final amendments. If you can clearly overcome rejections with claim amendments, file an after-final amendment before resorting to an RCE.
  • Request pre-appeal conferences: PACs are highly effective with this examiner. Before filing a full appeal brief, request a PAC to potentially resolve issues without full PTAB review.
  • Appeal filing as negotiation tool: This examiner frequently reconsiders rejections during the appeal process. Filing a Notice of Appeal may prompt favorable reconsideration during the mandatory appeal conference.

Relevant MPEP Sections for Prosecution Strategy

  • MPEP § 713.10: Examiner interviews - available before Notice of Allowance or transfer to PTAB
  • MPEP § 714.12: After-final amendments - may be entered "under justifiable circumstances"
  • MPEP § 1002.02(c): Petitionable matters to Technology Center Director
  • MPEP § 1004: Actions requiring primary examiner signature (allowances, final rejections, examiner's answers)
  • MPEP § 1207.01: Appeal conferences - mandatory for all appeals
  • MPEP § 1214.07: Reopening prosecution after appeal

Important Disclaimer

Not Legal Advice: The information provided in this report is for informational purposes only and does not constitute legal advice. You should consult with a qualified patent attorney or agent for advice specific to your situation.

No Guarantees: We do not provide any guarantees as to the accuracy, completeness, or timeliness of the statistics presented above. Patent prosecution statistics are derived from publicly available USPTO data and are subject to data quality limitations, processing errors, and changes in USPTO practices over time.

Limitation of Liability: Under no circumstances will IronCrow AI be liable for any outcome, decision, or action resulting from your reliance on the statistics, analysis, or recommendations presented in this report. Past prosecution patterns do not guarantee future results.

Use at Your Own Risk: While we strive to provide accurate and useful prosecution statistics, you should independently verify any information that is material to your prosecution strategy and use your professional judgment in all patent prosecution matters.