Prosecution Insights
Last updated: April 19, 2026
Application No. 18/461,321

RECOMBINANT INFLUENZA VIRUSES WITH STABILIZED HA FOR REPLICATION IN EGGS

Final Rejection §102§103§112
Filed
Sep 05, 2023
Examiner
LI, BAO Q
Art Unit
1671
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Wisconsin Alumni Research Foundation (Warf)
OA Round
4 (Final)
76%
Grant Probability
Favorable
5-6
OA Rounds
2y 11m
To Grant
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
676 granted / 891 resolved
+15.9% vs TC avg
Strong +26% interview lift
Without
With
+26.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
29 currently pending
Career history
920
Total Applications
across all art units

Statute-Specific Performance

§101
4.2%
-35.8% vs TC avg
§103
19.3%
-20.7% vs TC avg
§102
27.7%
-12.3% vs TC avg
§112
28.0%
-12.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 891 resolved cases

Office Action

§102 §103 §112
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 . Remark The response and amendment was filed on 12/17/2025. Claims 2-4 and 12 were canceled. Claims 1, 5-7 and 9-11 are pending and considered. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. 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. Claims 1, 5-7, 9 and 11 are still rejected under 35 U.S.C. 102((a) (1) as anticipated by or, in the alternative, under 35 U.S.C. 103 as obvious over WO 2015031166A1 to Jesse D. Bloom and further in view of the Martin et al. (Virology 1998, Vol. 241 pages 101-111) for claim 10. In the instant case, Applicants argued that the claimed invention is directed to mutations are presented at position 98, 153 and 183 referenced to SEQID NO: 7, whereas the ground of the rejected is based on only one position that matches to one of the mutation cited in the rejected claims. Applicants’ argument has been respectfully considered; however, it is not found persuasive because what Applicants argued is not what is cited in the claims. The claimed subject matter is still read on one residue mutation at position 98, 153 and 183. Therefore, The novelty is the amino acid residues at positions 98, 153 and 183 are all mutated, rather than one or two mutation Because Jesse D. Bloom teaches in several places regarding to make a mutation on sialic-acid receptor binding site as it was described in the previous office action: Example 1, CONSTRUCTION OF INFLUENZA NA RECEPTOR BINDING MUTANT A hemagglutinin (HA) gene from influenza A/Hong Kong/2/1968 (H3N2) strain was mutated to eliminate its sialic-acid receptor binding activity. In the H3 numbering scheme, these mutations included Y98F, H183F, L194A. While Jesse D. Bloom does not explicitly teach the mutation at the position 153 as cited in claim 10, Martin et al. also teach that mutation of 153 from W to A can prevent cell surface expression of HA (See Abstract, Fig. 1 and Table 1-2). Therefore, or obviously , it would have been obviously for any person with an ordinary skill in the art to be motivated to make the similar change described by Bloom using the HA set forth with SEQ ID NO: 121 as a reference sequence aligned with the claimed SEQ ID NO: 7 to produce the same biological mutant at the same sialic-acid receptor binding sites with a reasonable expectation of success because Bloom et al. also taught by that the mutation at the position of Y98F, H183F, L194A can eliminate the its sialic-acid receptor binding activity for the HA as well as take the successful conclusion of the mutation at 153 from W to A (W153A) to produce a HA mutant peptide antigen that absence of the sialic-acid receptor binding activity with a reasonable expectation of success. To this context, the rejection is maintained. Claim Rejections - 35 USC § 112 The rejection of Claim 8 under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, has been removed because of the persuasive argument. 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to BAO Q LI whose telephone number is (571)272-0904. The examiner can normally be reached M-F 8 am to 8 pm 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, Michael Allen can be reached at 571-270-3497. 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. BAO Q. LI Examiner Art Unit 1671 /BAO Q LI/Primary Examiner, Art Unit 1671
Read full office action

Prosecution Timeline

Sep 05, 2023
Application Filed
Nov 08, 2024
Non-Final Rejection — §102, §103, §112
Jan 07, 2025
Response Filed
Feb 28, 2025
Final Rejection — §102, §103, §112
Mar 19, 2025
Response after Non-Final Action
Jul 02, 2025
Request for Continued Examination
Jul 02, 2025
Response after Non-Final Action
Jul 08, 2025
Response after Non-Final Action
Oct 11, 2025
Non-Final Rejection — §102, §103, §112
Dec 17, 2025
Response Filed
Feb 21, 2026
Final Rejection — §102, §103, §112 (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

5-6
Expected OA Rounds
76%
Grant Probability
99%
With Interview (+26.5%)
2y 11m
Median Time to Grant
High
PTA Risk
Based on 891 resolved cases by this examiner. Grant probability derived from career allow rate.

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