Prosecution Insights
Last updated: April 19, 2026
Application No. 18/916,555

TECHNIQUES FOR PERFORMING MATRIX COMPUTATIONS USING HIERARCHICAL REPRESENTATIONS OF SPARSE MATRICES

Final Rejection §DP
Filed
Oct 15, 2024
Examiner
MACKES, KRIS E
Art Unit
2153
Tech Center
2100 — Computer Architecture & Software
Assignee
Nvidia Corporation
OA Round
2 (Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
2y 10m
To Grant
86%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
400 granted / 527 resolved
+20.9% vs TC avg
Moderate +10% lift
Without
With
+10.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
12 currently pending
Career history
539
Total Applications
across all art units

Statute-Specific Performance

§101
14.1%
-25.9% vs TC avg
§103
47.5%
+7.5% vs TC avg
§102
20.9%
-19.1% vs TC avg
§112
6.0%
-34.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 527 resolved cases

Office Action

§DP
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Response to Arguments Applicant’s arguments, see pages 7-12, filed 1/15/26, with respect to the 35 USC 101 rejection of claims 1-20 have been fully considered and are persuasive. The 35 USC 101 rejection of claims 1-20 has been withdrawn. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1-6, 8-16, and 18-20 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-20 of U.S. Patent No. 12,141,229. Although the claims at issue are not identical, they are not patentably distinct from each other because the limitations of the present claims are taught by the limitations of claims of U.S. Patent No. 12,141,229 with only minor grammatical differences. Claims 1-6, 8-16, and 18-20are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-20 of U.S. Patent No. 12,211,080. Although the claims at issue are not identical, they are not patentably distinct from each other because the limitations of the present claims are taught by the limitations of claims of U.S. Patent No. 12,211,080 with only minor grammatical differences. Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Nurvitadhi et al. U.S. Patent No. 10,146,738 An accelerator architecture for processing very-sparse and hyper-sparse matrix data is disclosed. A hardware accelerator comprises one or more tiles, each including a plurality of processing elements (PEs) and a data management unit (DMU). The PEs are to perform matrix operations involving very- or hyper-sparse matrices that are stored by a memory. The DMU is to provide the plurality of PEs access to the memory via an interface that is optimized to provide low-latency, parallel, random accesses to the memory. The PEs, via the DMU, perform the matrix operations by, issuing random access read requests for values of the one or more matrices, issuing random access read requests for values of one or more vectors serving as a second operand, and issuing random access write requests for values of one or more vectors serving as a result. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KRIS E MACKES whose telephone number is (571)270-3554. The examiner can normally be reached Monday-Friday 9:00-4:00 EST. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Kavita Stanley can be reached at 571-272-8352. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /KRIS E MACKES/Primary Examiner, Art Unit 2153
Read full office action

Prosecution Timeline

Oct 15, 2024
Application Filed
Dec 30, 2024
Response after Non-Final Action
Oct 16, 2025
Non-Final Rejection — §DP
Jan 15, 2026
Response Filed
Feb 07, 2026
Final Rejection — §DP
Apr 01, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12602438
COOKIELESS DELIVERY OF PERSONALIZIED CONTENT
2y 5m to grant Granted Apr 14, 2026
Patent 12572501
INTEGRATED DIGITAL-ANALOG ARCHIVING SYSTEMS AND METHODS FOR DOCUMENT PRESERVATION
2y 5m to grant Granted Mar 10, 2026
Patent 12572547
Systems and Methods for Deployment of Continuous Access Evaluation Protocol (CAEP) Hub Engine
2y 5m to grant Granted Mar 10, 2026
Patent 12563365
SYSTEMS AND METHODS FOR LOCALIZED INFORMATION PROVISION USING WIRELESS COMMUNICATION
2y 5m to grant Granted Feb 24, 2026
Patent 12541433
DATA BACKUP METHOD, ELECTRONIC DEVICE, DATA BACKUP SYSTEM, AND CHIP SYSTEM
2y 5m to grant Granted Feb 03, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

3-4
Expected OA Rounds
76%
Grant Probability
86%
With Interview (+10.5%)
2y 10m
Median Time to Grant
Moderate
PTA Risk
Based on 527 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month