Prosecution Insights
Last updated: April 19, 2026
Application No. 18/550,571

PLASMA KALLIKREIN INHIBITORS

Non-Final OA §103§112§DP
Filed
Sep 14, 2023
Examiner
ROBINSON, MIKHAIL O'DONNEL
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Takeda Pharmaceutical Company Limited
OA Round
1 (Non-Final)
57%
Grant Probability
Moderate
1-2
OA Rounds
3y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allow Rate
59 granted / 103 resolved
-2.7% vs TC avg
Strong +48% interview lift
Without
With
+47.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
50 currently pending
Career history
153
Total Applications
across all art units

Statute-Specific Performance

§101
3.8%
-36.2% vs TC avg
§103
41.6%
+1.6% vs TC avg
§102
20.9%
-19.1% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 103 resolved cases

Office Action

§103 §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 . 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 25-26 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 claims 25-26, the phrase "compounds I-1 through I-56, I-58, I-62 through I-152, I-154 through I-161, I-157, I-59 through I-61, I-53" renders the claim indefinite because it is unclear what are the structural limitations of the above compounds as “I-57….” are not known chemical names in the art and are not chemical formulas. As to the extent of the above compounds being of the same compounds found in applicants’ specifications, it is improper to import limitations from the specifications into the claims without properly showing the structure of the compounds in the claims. For prior art purposes examiner in interpreting the compounds of “I-57…” to be of the same compounds with its structural limitations as in applicants’ specification. 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 1-10, 12-16, 18-19, 21-24 and 26-29 are rejected under 35 U.S.C. 103 as being unpatentable over Fink et al. (WO 2019178129 A1). Regarding claims 1-10, 12-16, 18-19, 21-24 and 26-29, Fink teaches a method of treating a plasma kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema (relevant to claims 27-29) comprising administering to a patient in need thereof a compound of Formula (I) PNG media_image1.png 173 247 media_image1.png Greyscale or a pharmaceutically acceptable salt thereof. Wherein PNG media_image2.png 501 650 media_image2.png Greyscale PNG media_image3.png 890 652 media_image3.png Greyscale PNG media_image4.png 173 648 media_image4.png Greyscale (relevant to claims 1-10, 12-16) (para. 0038) and in some embodiments the compound is PNG media_image5.png 122 243 media_image5.png Greyscale , PNG media_image6.png 283 321 media_image6.png Greyscale , PNG media_image7.png 178 355 media_image7.png Greyscale , . Therefore it would have been obvious to someone of ordinary skill in the art at the time of filling to have developed formula (II), (III), (V), (VI), (VII), (VIII) and I-57 PNG media_image8.png 98 208 media_image8.png Greyscale of claimed invention to treat kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema. One would have been motivated to do so from the teachings of Fink of the above compounds and general formula (I) with its embodiments to treat kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema wherein CyA is 5- to 6- membered heteroarylene having 1-4 heteroatoms selected from oxygen, nitrogen, or sulfur which includes PNG media_image9.png 58 113 media_image9.png Greyscale . There is a reasonable expectation of treating kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administering formula (II), (III), (V), (VI), (VII), (VIII) and I-57 PNG media_image8.png 98 208 media_image8.png Greyscale of claimed invention from the teaching of Fink. 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 1-9 and 12-29 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 that over laps the embodiments 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 1-9, 12-17, 20, 22 and 26-29 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 compounds that over laps the embodiments 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 1-10, 12-16, 18-19 and 21-29 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-17 of copending Application No. 17/024,189 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because claims 1-17 of copending ‘189 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compounds that over laps the embodiments 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 1-10, 12-16, 18-19 and 21-29 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 that over laps the embodiments of claim 1 of claimed invention. Claims 1-10, 12-16, 18-19, 21-24 and 26-29 rejected on the ground of nonstatutory double patenting as being unpatentable over claims 20, 22-37 and 39-50 of U.S. Patent No. 11352356. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S ‘356 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compounds that over laps the embodiments of claim 1 of claimed invention and compound PNG media_image8.png 98 208 media_image8.png Greyscale . Claims 1-10, 12-16, 18-19, 21-24 and 26-29 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-16 and 21-33 of U.S. Patent No. 12441724. Although the claims at issue are not identical, they are not patentably distinct from each other because U.S ‘724 teaches a treatment of kallikrein-mediated disease or disorder of hereditary angioedema or diabetic macular edema comprising administration of compounds that over laps the embodiments of claim 1 of claimed invention and compound PNG media_image8.png 98 208 media_image8.png Greyscale . Claims 1-10, 12-16, 20-22 and 25-27 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 compounds that over laps with claim 1 of claimed invention and compounds PNG media_image10.png 104 214 media_image10.png Greyscale PNG media_image11.png 101 199 media_image11.png Greyscale as well as other compounds of claimed invention compounds I-62 through I-152. Claims 1-10, 12-16, 20-22 and 25-29 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 compounds that over laps with claim 1 of claimed invention and compounds PNG media_image10.png 104 214 media_image10.png Greyscale PNG media_image11.png 101 199 media_image11.png Greyscale as well as other compounds of claimed invention compounds I-62 through I-152. Allowable Subject Matter Claim 11 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion 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
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Prosecution Timeline

Sep 14, 2023
Application Filed
Dec 08, 2025
Non-Final Rejection — §103, §112, §DP (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
57%
Grant Probability
99%
With Interview (+47.7%)
3y 6m
Median Time to Grant
Low
PTA Risk
Based on 103 resolved cases by this examiner. Grant probability derived from career allow rate.

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