USPTO Art Unit 2138 Prosecution Statistics

Art Unit Information

Art Unit: 2138
Group: 2130
Tech Center: 2100
Total Cases: 5,986
Last Active: September 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19337250GPU CHIPLETS USING HIGH BANDWIDTH CROSSLINKSSeptember 2025February 2026Allow410NoNo
19316135Crowd Based Data TieringSeptember 2025October 2025Allow200NoNo
19260222MEMORY ACCESS DEVICE AND OPERATING METHOD THEREOFJuly 2025February 2026Allow710YesNo
19235711SYSTEM AND METHOD FOR DYNAMIC CLUSTER-BASED CACHE COHERENCY FOR MULTI-CORE PROCESSORSJune 2025August 2025Allow210NoNo
19041987ADJUSTED PROGRAMMING ASSOCIATED WITH READ ERRORSJanuary 2025March 2026Allow1400YesNo
19019983PROBABILISTIC DATA PACKING USING FORECASTED COMPRESSION SIZEJanuary 2025February 2026Allow1300NoNo
19013498Storage Network Having Metadata Storage TreesJanuary 2025January 2026Allow1310NoNo
19006846MEMORY MANAGEMENT UNITDecember 2024February 2026Allow1300NoNo
18989585METHOD AND APPARATUS FOR REDUCING MIRROR DATA TRANSMISSION AMOUNT BY DUAL LAYER CACHE, AND DEVICE AND MEDIUMDecember 2024February 2025Allow200NoNo
18875283DATA CACHING METHOD AND APPARATUS, DEVICE, AND STORAGE MEDIUMDecember 2024June 2025Allow610NoNo
18976474MEMORY PIPELINE CONTROL IN A HIERARCHICAL MEMORY SYSTEMDecember 2024January 2026Allow1300YesNo
18977667NEURAL PROCESSING DEVICE AND METHOD FOR CONVERTING DATA THEREOFDecember 2024March 2026Allow1510NoNo
18976182Lightweight GPU Memory AllocatorDecember 2024August 2025Allow910YesNo
18974774SYSTEM AND METHOD FOR MANAGING EVENT MESSAGES IN A CACHE COHERENT INTERCONNECTDecember 2024March 2026Allow1510NoNo
18967292CORRECTIVE READ WITH PARALLEL AUTO-READ CALIBRATION IN A MEMORY SUB-SYSTEMDecember 2024October 2025Allow1100NoNo
18966666PERFORMING MODULATION OPERATIONS IN A MEMORY SUB-SYSTEMDecember 2024January 2026Allow1400NoNo
18965828RESOURCE OBJECT PROCESSING METHOD, DEVICE, AND STORAGE MEDIUMDecember 2024May 2025Allow500NoNo
18965888PROCESSOR AND METHOD FOR MEMORY ACCESS INSTRUCTION, AND ELECTRONIC DEVICEDecember 2024February 2026Allow1410NoNo
18962158Cache Control to Preserve Register DataNovember 2024January 2026Allow1410NoNo
18961341DATA STORAGE DEVICE AND OPERATING METHOD THEREOFNovember 2024February 2026Allow1400NoNo
18868114SYSTEMS AND METHODS OF ALLOCATING GPU MEMORYNovember 2024December 2025Allow1300NoNo
18948380NEURAL PROCESSING DEVICENovember 2024January 2026Allow1510NoNo
18945678NON-VOLATILE MEMORY DEVICE, STORAGE DEVICE, OPERATING METHOD OF STORAGE CONTROLLER, AND OPERATING METHOD OF THE STORAGE DEVICENovember 2024January 2026Allow1400YesNo
18945939VECTOR IN RESTRICTED MEMORY TO TRACK REMOTE COPIESNovember 2024January 2026Allow1400NoNo
18944960METHOD, SYSTEM, AND CIRCUIT FOR MEMORY PROTECTION UNIT CONFIGURATION AND CONTENT GENERATIONNovember 2024March 2026Allow1610YesNo
18940938OPERATING METHOD OF AN ELECTRONIC DEVICENovember 2024January 2026Allow1510NoNo
18939528MEMORY CONTROL CIRCUIT AND CONTROL METHOD FOR CONTROLLING MEMORY DEVICENovember 2024January 2026Allow1410NoNo
18939218PROCESSING-IN-MEMORY DEVICESNovember 2024December 2025Allow1300NoNo
18939310METADATA REGISTERS FOR A MEMORY DEVICENovember 2024January 2026Allow1510NoNo
18936802METHODS AND ALLOCATORS FOR ALLOCATING PORTIONS OF A STORAGE UNIT USING VIRTUAL PARTITIONINGNovember 2024January 2026Allow1510NoNo
18935642Ring Buffer Storage Method and Ring Buffer Storage System Capable of Minimizing Extra Overhead UtilizationNovember 2024February 2026Allow1500NoNo
18931068DEVICE OF ENCRYPTION AND DECRYPTION AND METHOD FOR PROCESSING DATAOctober 2024October 2025Allow1100NoNo
18928526STORAGE DEVICE WITH ERASE UNIT LEVEL ADDRESS MAPPINGOctober 2024February 2026Allow1510YesNo
18929044Testing Replica Data Using Modifiable Cloned ImagesOctober 2024March 2026Allow1600NoNo
18928358METHOD, DEVICE, AND PROGRAM PRODUCT FOR COLLECTING OR SHOOTING MEMORY BULLETSOctober 2024January 2026Allow1500YesNo
18928734NAND-BASED STORAGE DEVICE WITH PARTITIONED NONVOLATILE WRITE BUFFEROctober 2024December 2025Allow1310NoNo
18925984Pattern Match Prefetcher with Supplemental Program-Counter-Based LearningOctober 2024November 2025Allow1300NoNo
18926266Prefetch Circuitry with Compression for Demoted EntriesOctober 2024October 2025Allow1200YesNo
18859350SCALABLE CACHE PROCESSING METHOD AND APPARATUS FOR APPLICATION, DEVICE AND MEDIUMOctober 2024October 2025Allow1200NoNo
18924736Stateful Application Persistency For Reclaimable Compute InstancesOctober 2024November 2025Allow1200YesNo
18920086MEMORY DEVICE WITH STAGGERED ACCESSOctober 2024January 2026Allow1500NoNo
18920644GARBAGE COLLECTION FOR OBJECT-BASED STORAGE SYSTEMSOctober 2024November 2025Allow1300NoNo
18918461MANAGING DATA COMPACTION FOR ZONES IN MEMORY DEVICESOctober 2024January 2026Allow1510NoNo
18917369COMPUTING SYSTEM AND METHOD FOR POWER-SAVING COMPUTE-IN-MEMORY DESIGNOctober 2024September 2025Allow1100NoNo
18913399CONTROLLER AND STORAGE DEVICEOctober 2024December 2025Allow1400YesNo
18911509METHOD, DEVICE, AND COMPUTER PROGRAM PRODUCT FOR PERFORMING FILE SYSTEM CHECKOctober 2024March 2026Allow1710YesNo
18911022CONTROLLERS, TEST SYSTEMS, MEMORY SYSTEMS, DATA PROCESSING METHODS AND DEVICESOctober 2024March 2026Allow1710NoNo
18909524ARRAY HASH MANAGEMENT FOR COMPUTE REQUESTSOctober 2024October 2025Allow1200NoNo
18907760SEMICONDUCTOR MEMORY DEVICE AND MEMORY SYSTEM INCLUDING THE SAMEOctober 2024October 2025Allow1200NoNo
18906876PROGRAM COMMAND GENERATION WITH DUMMY DATA GENERATION AT A MEMORY DEVICEOctober 2024September 2025Allow1100YesNo
18905885SYSTEM AND METHOD OF HANDLING MODIFICATION TRACKING DATA IN TIMESTEP SHARED MEMORY MULTI-PROCESSORS (TSMP)October 2024September 2025Allow1100NoNo
18904777CONTROLLING METHOD OF A MEMORY CARDOctober 2024January 2026Allow1510NoNo
18903011Remote memory cache replacementOctober 2024December 2025Allow1510NoNo
18903073STORAGE DEVICE CAPABLE OF PERFORMING PEER-TO-PEER DATA TRANSFER AND OPERATING METHOD THEREOFOctober 2024October 2025Allow1300NoNo
18901028PROCESSING WRITES TO MULTIPLE TARGETS IN A DIRECTORY-BASED CACHE COHERENT ELECTRONIC SYSTEMSeptember 2024September 2025Allow1200NoNo
18901793CACHING IN A SOLVER SYSTEMSeptember 2024November 2025Allow1400NoNo
18899895CACHING OF LOGICAL-TO-PHYSICAL MAPPING INFORMATION IN A MEMORY SUB-SYSTEMSeptember 2024December 2025Allow1510NoNo
18900582Methods and Apparatus for Timed Hardware Delay for Reductions in Instruction Fetch TrafficSeptember 2024August 2025Allow1100NoNo
18897614DYNAMIC POWER LOSS PROTECTION ALLOCATION OF MANAGED FLASH STORAGE DEVICESSeptember 2024September 2025Allow1200YesNo
18894324CACHE COHERENCE SHARED STATE SUPPRESSIONSeptember 2024January 2026Allow1610NoNo
18893262STORING A LOGICAL-TO-PHYSICAL MAPPING IN NAND MEMORYSeptember 2024December 2025Allow1510NoNo
18892718END-TO-END QUALITY OF SERVICE MANAGEMENT FOR MEMORY DEVICESeptember 2024March 2026Allow1710YesNo
18892722SYSTEM AND METHOD OF WRITING TO NONVOLATILE MEMORY USING WRITE BUFFERSSeptember 2024March 2026Allow1710NoNo
18893397CACHE-DESIGNING METHOD WHERE CACHE DATA AND CACHE-MISS INFORMATION SHARE THE SAME STORAGE SPACESeptember 2024August 2025Allow1100NoNo
18891497Cache Writeback CircuitSeptember 2024October 2025Allow1300NoNo
18889852MEMORY CONTROLLER HAVING A WRITE BUFFERSSeptember 2024December 2025Allow1510NoNo
18888496PROCESSOR WITH HIGH-CAPACITY LAST-LEVEL CACHESeptember 2024March 2026Allow1710NoNo
18887810SILENT CACHE LINE EVICTIONSeptember 2024February 2026Allow1710NoNo
18885842COHERENT SYSTEM AND A METHOD OF MAINTAINING CACHE COHERENCE USING THEREOFSeptember 2024January 2026Allow1610NoNo
18886421Technique for Power Optimized Memory PoolsSeptember 2024March 2026Allow1710YesNo
18886590STORE-TO-LOAD FORWARDING CORRECTNESS CHECKS USING PHYSICAL ADDRESS PROXIES STORED IN LOAD QUEUE ENTRIESSeptember 2024October 2025Allow1310NoNo
18884821CACHE AWARE SEARCHINGSeptember 2024November 2025Allow1400YesNo
18884449COMPUTER SYSTEM, REMOTE COPY CONTROL METHOD, AND REMOTE COPY CONTROL PROGRAMSeptember 2024March 2026Allow1810NoNo
18882329Scalable Memory Resource Management for Multiple Forwarding Engine Systems with Fungible Memory Sub-systemsSeptember 2024January 2026Allow1601NoNo
18882180ELECTRONIC DEVICE AND ELECTRONIC DEVICE CONTROL METHODSeptember 2024February 2026Allow1700NoNo
18882315STORAGE APPARATUS AND CONTROL METHOD FOR STORAGE APPARATUSSeptember 2024September 2025Allow1200NoNo
18846246ELECTRONIC CONTROL DEVICE AND WRITE CONTROL METHODSeptember 2024March 2026Allow1810YesNo
18830735COMPUTER SYSTEM AND DATA MANAGEMENT METHOD IN STORAGE SYSTEMSeptember 2024March 2026Allow1810NoNo
18829548LOGICAL TO PHYSICAL (L2P) ADDRESS MAPPING WITH FAST L2P TABLE LOAD TIMESSeptember 2024December 2025Allow1510YesNo
18830072FAST DECODING OF COMPRESSED DATASeptember 2024September 2025Allow1200NoNo
18829375CACHE SERVER AND CONTENT DELIVERY SYSTEMSeptember 2024September 2025Allow1200NoNo
18845334IMAGE DATA PROCESSING METHOD AND APPARATUS, AND STORAGE MEDIUMSeptember 2024March 2026Allow1810NoNo
18828524STORAGE SYSTEM AND METHOD FOR REPLICATION BASED ON LOAD PREDICTIONSeptember 2024September 2025Allow1200NoNo
18828045APPARATUS, METHOD, AND SYSTEM FOR MANAGING REPLICATION BASED ON REPLICATION DELAY TIMESeptember 2024February 2026Allow1710NoNo
18825897EFFICIENT MACHINE LEARNING CACHING VIA ATTENTION OUTPUT-BASED TOKEN EVICTIONSeptember 2024November 2025Allow1410NoNo
18824573METHOD OF IMPROVING PROGRAMMING OPERATIONS IN 3D NAND SYSTEMSSeptember 2024December 2025Allow1610NoNo
18820740SERVICING CPU DEMAND REQUESTS WITH INFLIGHT PREFETCHESAugust 2024August 2025Allow1200YesNo
18818738METHODS AND APPARATUS FOR EVICTION IN DUAL DATAPATH VICTIM CACHE SYSTEMAugust 2024February 2026Allow1710NoNo
18818781PROCESSORAugust 2024July 2025Allow1100NoNo
18819877Memory Controller Reservation of Resources for Cache HitAugust 2024January 2026Allow1610NoNo
18818259Controller Memory Buffer (CMB) As CacheAugust 2024December 2025Allow1610YesNo
18817531COPYING OF DATA IN A STORAGE SYSTEM BETWEEN STORAGE DRIVES THAT HAVE EMBEDDED COMPRESSIONAugust 2024August 2025Allow1200NoNo
18815747METADATA COMPACTIONAugust 2024January 2026Allow1710YesNo
18815765USING PHYSICAL ADDRESS PROXIES TO ACCOMPLISH PENALTY-LESS PROCESSING OF LOAD/STORE INSTRUCTIONS WHOSE DATA STRADDLES CACHE LINE ADDRESS BOUNDARIESAugust 2024October 2025Allow1410NoNo
18814197CACHE BASED MEMORY ACCESS TRACKINGAugust 2024February 2026Allow1810NoNo
18811782STORAGE DEVICE AND METHOD OF OPERATING THE SAMEAugust 2024August 2025Allow1200YesNo
18809782STORAGE CONTROLLER ADJUSTING READ VOLTAGE LEVEL, STORAGE DEVICE INCLUDING THE SAME, AND METHOD OF OPERATING THE SAMEAugust 2024February 2026Allow1710YesNo
18809810STORAGE DEVICE FOR SKIPPING REDUNDANT REPLAY AND JOURNAL REPLAY METHOD THEREOFAugust 2024February 2026Allow1810YesNo
18809645FLEXIBLE VOLUME PROVISIONINGAugust 2024December 2025Allow1610YesNo
18808590MEMORY DEVICE, MEMORY SYSTEM, AND PROGRAM OPERATION METHOD THEREOFAugust 2024January 2026Allow1710YesNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 2138.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
93
Examiner Affirmed
61
(65.6%)
Examiner Reversed
32
(34.4%)
Reversal Percentile
61.3%
Higher than average

What This Means

With a 34.4% 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
263
Allowed After Appeal Filing
98
(37.3%)
Not Allowed After Appeal Filing
165
(62.7%)
Filing Benefit Percentile
76.9%
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, 37.3% 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.

Art Unit 2138 - Prosecution Statistics Summary

Executive Summary

Art Unit 2138 is part of Group 2130 in Technology Center 2100. This art unit has examined 5,986 patent applications in our dataset, with an overall allowance rate of 88.5%. Applications typically reach final disposition in approximately 24 months.

Comparative Analysis

Art Unit 2138's allowance rate of 88.5% places it in the 87% percentile among all USPTO art units. This art unit has a significantly higher allowance rate than most art units at the USPTO.

Prosecution Patterns

Applications in Art Unit 2138 receive an average of 1.64 office actions before reaching final disposition (in the 30% percentile). The median prosecution time is 24 months (in the 82% percentile).

Strategic Considerations

When prosecuting applications in this art unit, consider the following:

  • The art unit's allowance rate suggests a more favorable examination environment compared to the USPTO average.
  • With fewer office actions than average, plan for relatively streamlined prosecution.
  • The median prosecution time is shorter than average and should be factored into your continuation and client communication strategies.
  • Review individual examiner statistics within this art unit to identify examiners with particularly favorable or challenging prosecution patterns.

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.