Prosecution Insights
Last updated: August 18, 2026
Application No. 18/550,571

PLASMA KALLIKREIN INHIBITORS

Final Rejection §112§DP
Filed
Sep 14, 2023
Priority
Mar 17, 2021 — provisional 63/162,477 +1 more
Examiner
ROBINSON, MIKHAIL O'DONNEL
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Takeda Pharmaceutical Company Limited
OA Round
2 (Final)
59%
Grant Probability
Moderate
3-4
OA Rounds
4m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allowance Rate
73 granted / 124 resolved
-1.1% vs TC avg
Strong +42% interview lift
Without
With
+41.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
46 currently pending
Career history
160
Total Applications
across all art units

Statute-Specific Performance

§101
5.3%
-34.7% vs TC avg
§103
40.9%
+0.9% vs TC avg
§102
21.9%
-18.1% vs TC avg
§112
22.1%
-17.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 124 resolved cases

Office Action

§112 §DP
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 3-5, filed 04/10/2026, with respect to the 103 rejection of claims 1-10, 12-16, 18-19, 21-24 and 26-29 under Fink et al. (WO 2019178129) and nonstatutory double patenting rejection over US Patent No. 11,352,356 and 12,441,724 have been fully considered and are persuasive. Therefore, the rejection of claims 1-10, 12-16, 18-19, 21-24 and 26-29 has been withdrawn. Applicant’s argument (Pages 6-7) with respect to the nonstatutory double patenting rejection over application No. 18/550,306 and 18/550,486 is rendered moot. As applicant argues the nonstatutory double patenting applications be held in abeyance, the rejection of record is maintained. Applicants’ argument (Page 8) with respect to the nonstatutory double patenting rejection over application No. 17/024,189 is fully considered but not persuasive. Applicant argues the formula of ‘189 does not teach or suggest the formula of claim 1 of claimed invention, in particular to the limitations of claimed L not corresponding to ‘189 limitation of (CR’R”)n. It is noted from ‘189 (CR’R”)n corresponds with claimed L of being CH2. Thus, the nonstatutory double patenting rejection over application No. 17/024,189 is maintained. Applicants’ argument (Page 9) with respect to the nonstatutory double patenting rejection over US Patent No. 12,065,448 is fully considered but not persuasive. Applicant argues the formula of ‘448 does not teach or suggest the formula of claim 1 of claimed invention, in particular to the limitations of claimed L not corresponding to ‘448 limitation of CR’. It is noted from ‘448 CR’ corresponds with claimed L of being CH2. Thus, the nonstatutory double patenting rejection over US Patent No. 12,065,448 is maintained. Applicants’ argument (Pages 10-12) with respect to the nonstatutory double patenting rejection over US Patent No. 11,787,796 and 12,221,441 are fully considered but not persuasive. Applicant argues the formula of ‘796 and ‘441 does not teach or suggest the formula of claim 1 of claimed invention, in particular to the limitations of claimed L not corresponding to ‘796 and ‘441 limitation of (R1R2)n. It is noted from ‘796 and ‘441 (R1R2)n corresponds with claimed L of being CH2. Thus, the nonstatutory double patenting rejection over US Patent 11,787,796 is maintained. Applicant has canceled claims 11 and 26. Claims 1-10, 12-25 and 27-29 is pending. Claims 1-10, 12-25 and 27-29 is now evaluated on its merits. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-7, 9-10, 12-16, 18-24 and 27-29 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Regarding claim 1 and 7, the phrase " L is an optionally substituted C1-2 hydrocarbon chain, wherein 1 methylene unit is independently replaced with" renders the claim indefinite because it is unclear if applicant is intending a C1 hydrocarbon to be substituted or optionally substituted or the substitution is only when L is a C2 hydrocarbon chain and one methylene unit is replaced. Ultimately, the metes and bounds of the claim is unclear. For prior art purposes examiner is interpreting the claim as optionally substituted C1-2 hydrocarbon chain wherein L can be CH2, which is represented in the above reasoning for the double patenting rejections being maintained. Claims 2-6, 9-10, 12-16, 18-24 and 27-29 are equally rendered indefinite as being dependent from claim 1, thus bound to the above L limitation without further limiting. 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, 8-10, 12-16, 18, 20-22 and 27-29 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-2, 5-7, 9-10, 13, 15-16, 20-22, 27, 32, 35-37 and 41 of U.S. Patent No. 12221441. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S ‘441 teaches a pharmaceutical composition for the treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising PNG media_image1.png 155 293 media_image1.png Greyscale with the substitutions of claim 1 that over laps with claim 1 of claimed invention. Additionally taught are compounds PNG media_image2.png 104 214 media_image2.png Greyscale PNG media_image3.png 101 199 media_image3.png Greyscale as well as other compounds of claimed invention compounds I-62 through I-152. Claims 1-6, 8-10, 12-16, 18, 20-22 and 27 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-2, 5, 7, 9-12, 16, 20-22, 32, 36-37, 39 and 42-43 of U.S. Patent No. 11787796. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S ‘796 teaches a pharmaceutical composition comprising PNG media_image1.png 155 293 media_image1.png Greyscale with the substitutions of claim 1 that over laps with claim 1 of claimed invention. Additionally taught are compounds PNG media_image2.png 104 214 media_image2.png Greyscale PNG media_image3.png 101 199 media_image3.png Greyscale as well as other compounds of claimed invention compounds I-62 through I-152. Claims 1-6, 8-10, 12-16, 18-19 and 21-24 and 27-29 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 18-36 of U.S. Patent No. 12065448. Although the claims at issue are not identical, they are not patentably distinct from each other because claims 18-36 of U.S ‘448 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compounds PNG media_image4.png 141 393 media_image4.png Greyscale with its limitations of claim 1 overlaps with the limitations of claim 1 of claimed invention. Claims 1-6, 8-10, 12-16, 18-19, 21-24 and 27-29 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-17 of US Patent No. 11370803. Although the claims at issue are not identical, they are not patentably distinct from each other because claims 1-17 of US ‘803 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compound PNG media_image5.png 132 414 media_image5.png Greyscale with its limitations of claim 1 over laps the limitations of claim 1 of claimed invention. Claims 1-6, 9, 12-17, 20, 22 and 27-29 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-30 of copending Application No. 18/550,486 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because claims 1-30 of copending ‘486 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compound PNG media_image6.png 110 170 media_image6.png Greyscale with its limitations of claim 1 overlaps the limitations of claim 1 of claimed invention. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-6, 9 and 12-25 and 27-29 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-13 and 15-34 of copending Application No. 18/550,306 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because copending ‘306 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compounds PNG media_image7.png 124 272 media_image7.png Greyscale with its limitations of claim 1 over laps the limitations of claim 1 of claimed invention. Additionally taught are compounds of PNG media_image8.png 189 277 media_image8.png Greyscale and PNG media_image9.png 151 322 media_image9.png Greyscale This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 MIKHAIL O'DONNEL ROBINSON whose telephone number is (571)270-0777. The examiner can normally be reached Monday-Friday 7:30am-5:30pm. 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, Kortney Klinkel can be reached at 571-270-5239. 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. MIKHAIL O'DONNEL. ROBINSON Examiner Art Unit 1627 /MIKHAIL O'DONNEL ROBINSON/Examiner, Art Unit 1627 /SARAH PIHONAK/Primary Examiner, Art Unit 1627
Read full office action

Prosecution Timeline

Sep 14, 2023
Application Filed
Dec 10, 2025
Non-Final Rejection mailed — §112, §DP
Apr 10, 2026
Response Filed
Jun 29, 2026
Final Rejection mailed — §112, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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PROCESS FOR THE PREPARATION OF TOFACITINIB AND INTERMEDIATES THEREOF
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2y 11m to grant Granted Jul 28, 2026
Patent 12691085
CANCER TREATMENT COMPOSITION AND METHOD
3y 1m to grant Granted Jul 28, 2026
Patent 12686686
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3y 6m to grant Granted Jul 21, 2026
Patent 12673954
BENZOFURAN COMPOUNDS AS STING AGONISTS
2y 11m to grant Granted Jul 07, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
59%
Grant Probability
99%
With Interview (+41.5%)
3y 4m (~4m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 124 resolved cases by this examiner. Grant probability derived from career allowance rate.

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