Prosecution Insights
Last updated: August 17, 2026
Application No. 19/291,371

METHOD AND APPARATUS FOR DOUBLE-WRITING BASED ON WRITE-AHEAD

Non-Final OA §103
Filed
Aug 05, 2025
Priority
Feb 15, 2023 — RE 10-2023-0020158 +2 more
Examiner
YU, JAE UN
Art Unit
Tech Center
Assignee
Korea Advanced Institute of Science and Technology
OA Round
1 (Non-Final)
90%
Grant Probability
Favorable
1-2
OA Rounds
1y 5m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 90% — above average
90%
Career Allowance Rate
668 granted / 744 resolved
+29.8% vs TC avg
Moderate +10% lift
Without
With
+9.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
18 currently pending
Career history
763
Total Applications
across all art units

Statute-Specific Performance

§101
5.3%
-34.7% vs TC avg
§103
51.0%
+11.0% vs TC avg
§102
24.6%
-15.4% vs TC avg
§112
8.9%
-31.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 744 resolved cases

Office Action

§103
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 . Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. 1. Claims 1, 6, and 10 are rejected under 35 U.S.C. 103 as being unpatentable over Chilimbi et al. (US 2004/0103408), “Chilimbi”, in view of Heirman et al. (US 2019/0095333), “Heirman”. 2. As per claim 1, Chilimbi discloses classifying write requests [prefetch determination requests, abstract] for different streams into write-ahead [Hot Data Stream 760, figure 13] and write-behind [non-Hot Data Stream 760, figure 13] according to order constraints [Data Reference Sequence, figure 13]; and recording the streams to meet the order constraints [prefetching the hot data stream, abstract]. Chilimbi does not disclose expressly (making the write-ahead) a double write (for the streams). Heirman discloses a double data rate (DDR) prefetch (“write-ahead”) in paragraph 55. Chilimbi and Heirman are analogous art because they are from the same field of endeavor of prefetching. Before the effective filing date of the application, it would have been obvious to a person of ordinary skill in the art to modify Chilimbi by including the DDR prefetch as taught by Heirman in paragraph 55. The motivation for doing so would have been to provide system flexibility as expressly taught by Heirman in paragraph 55. 3. As per claims 6 and 10, the examiner directs the applicant’s attention to claim rejection above. Conclusion A. Allowable Subject Matter Claims 2-5 and 7-9 are objected to. The closest prior art of record, “Chilimbi” discloses prefetching hot data stream in the abstract. The primary reasons for allowance of claims 2 and 7 in the instant application is the combination with the inclusion in these claims that “wherein the streams are classified into a leader stream and a follower stream according to the order constraints, and the order constraints include a constraint condition within the leader stream, and a constraint condition between the leader stream and the follower stream”. The prior art of record neither anticipates nor renders obvious the above recited combination. The primary reasons for allowance of claim 5 in the instant application is the combination with the inclusion in these claims that “wherein the recording of the streams comprises: verifying the order constraints for the streams from the double write; and recording each of the streams to meet the order constraints”. The prior art of record neither anticipates nor renders obvious the above recited combination. As allowable subject matter has been indicated, applicant's response must either comply with all formal requirements or specifically traverse each requirement not complied with. See 37 C.F.R. § 1.111(b) and § 707.07(a) of the MPEP. B. Claims Rejected Claims 1, 6, and 10 are rejected. C. Direction for Future Remarks Any inquiry concerning this communication or earlier communications from the examiner should be directed to JAE UN YU whose telephone number is (571)272-1133. The examiner can normally be reached M-F 9-5. 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, Tim Vo can be reached on (571)272-3642. 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. /JAE U YU/Primary Examiner, Art Unit 2138
Read full office action

Prosecution Timeline

Aug 05, 2025
Application Filed
Jul 27, 2026
Non-Final Rejection mailed — §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
90%
Grant Probability
99%
With Interview (+9.8%)
2y 6m (~1y 5m remaining)
Median Time to Grant
Low
PTA Risk
Based on 744 resolved cases by this examiner. Grant probability derived from career allowance rate.

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