Prosecution Insights
Last updated: April 19, 2026
Application No. 19/213,363

COMPOSITIONS FOR IMPROVING KIDNEY FUNCTION IN PATIENTS WITH HEPATORENAL SYNDROME

Final Rejection §102§103§DP
Filed
May 20, 2025
Examiner
WEN, SHARON X
Art Unit
1641
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Mallinckrodt Pharmaceuticals Ireland Limited
OA Round
2 (Final)
57%
Grant Probability
Moderate
3-4
OA Rounds
3y 9m
To Grant
88%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allow Rate
349 granted / 613 resolved
-3.1% vs TC avg
Strong +32% interview lift
Without
With
+31.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
40 currently pending
Career history
653
Total Applications
across all art units

Statute-Specific Performance

§101
2.7%
-37.3% vs TC avg
§103
20.8%
-19.2% vs TC avg
§102
23.1%
-16.9% vs TC avg
§112
30.4%
-9.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 613 resolved cases

Office Action

§102 §103 §DP
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Applicant’s amendment, filed 12/22/2025, has been entered. Claims 1-21 have been canceled. Claims 22-51 have been added. All previous rejections have been withdrawn in view of Applicant’s cancelation of claims 1-21. New grounds of rejections set forth herein are necessitated by Applicant’s amendment, filed 12/22/2025. 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. New Grounds of Rejection are necessitated by Applicant’s amendment, filed 12/22/2025. Claims 22-33, 44-45, 47-51 are rejected under 35 U.S.C. 102(a)(1) are rejected as being anticipated by Wong et al. (NEJM March 2021; 384:818-828; including the Protocol and Supplemental Appendix made available with the full text of the Wong article at NEJM.org; reference of record). Wong et al. taught a method for treating a patient having: 1) HRS-1, (see Wong et al. Abstract) 2) MELD score < 35, (see Wong et al. Table 1; Supplemental Appendix Figure S7) 3) Serum creatinine level < 5 mg/dL (see Table 1 Wong et al.) and 4) ACLF grade < 3; (see Supplemental Appendix Table S8g) Comprising the method steps of: measuring the baseline serum creatinine level, (see Supplemental Appendix Fig S10) administering a pharmaceutical composition comprising terlipressin (see Protocol page 6 of 90) obtaining a Scr level during the initial 1-4 days of administration (Protocol Table 13-1; Supplemental Appendix Table S8) continuing administration of the pharmaceutical composition until at least two Scr values less than or equal to 1.5 mg/dL (page 819, right column, second paragraph). Moreover, patients with the above conditions (2-4) had improved 90-day survival as compared to patients with the same conditions (2-4) treated with a placebo comprising albumin (see Supplemental Appendix page 48 and Table S8i). It is noted that step d is a conditional step and need not be given patentable weight even though it is met with art. The prior art also taught the following claim limitations (see below mapping) claims Prior art 23 Page 819, left column, second paragraph 24 Protocol page 28 of 90 25, 45, 47 Protocol page 43 of 90; Vital sign measurements include SpO2 27 Protocol page 48 of 90 13.2.3.1 Dosing (Up to 14 Days) 28, 29, 30 Protocol page 6 of 90 31 Supplemental Appendix page 48 32, 33 Protocol page 6 of 90; Dose Modification 49 Page 821 Table 1 50 Page 825 first paragraph 51 Page 826, last paragraph It is noted that claims 26 and 48 recite the limitation “SpO2 of 90% or above” or which is a result of the method steps performed. Given that the prior art taught the same method steps, it would necessarily result in 90% or above SpO2 level. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. New Grounds of Rejection are necessitated by Applicant’s amendment, filed 12/22/2025. Claims 34-43 and 46 are rejected under 35 U.S.C. 103 as being unpatentable over Wong et al. (NEJM March 2021; 384:818-828; including the Protocol and Supplementary Appendix made available with the full text of the Wong article at NEJM.org) in view of Jubran (Critical Care 2015; 19:272). The teaching of Wong et al. has been discussed above (see 102). The only claim limitation Wong did not teach was that the HRS-1 patient having a baseline SpO2 greater than 90%. However, it would have been obvious for one of ordinary skill in the art to exclude patient with SpO2 baseline less than 90% or perform said monitoring throughout the course of treatment because Wong disclosed that terlipressin treatment was associated with respiratory failure (see, e.g., last paragraph on page 818). Upon reading the prior art teachings by, one of ordinary skill in the art would have been motivated to 1) take SpO2 reading before administering terlipressin; 2) not give terlipressin to patients whose SpO2 is less than 90% which is indicative of hypoxemia associated with respiratory failure and frequently in order to avoid hypoxia or respiratory symptoms. It is noted that oxygen saturation less than 90% is an art known marker for hypoxemia (see, e.g., Jubran on page 5, Clinical Applications). Therefore, one of ordinary skill in the art would have picked 90% as a threshold for detecting terlipressin-induced respiratory failure. Therefore, the invention, as a whole, was prima facie obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention as evidenced by the references, especially in the absence of evidence to the contrary. 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. New Grounds of Rejection are necessitated by Applicant’s amendment, filed 10/07/2025. Claims 22-51 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-28 of U.S. Patent No. 10,335,452 in view Wong et al. (NEJM March 2021; 384:818-828; including the Protocol and Supplementary Appendix made available with the full text of the Wong article at NEJM.org) in view of Jubran (Critical Care 2015; 19:272). The claims of patent ‘452 disclosed a method of treating HRS comprising administering terlipressin and assessing Scr. Although the patent claims did not disclose obtaining SpO2, assessing an ACLF grade or monitoring SpO2 level, it would have been obvious to perform these steps in view of Wong et al. and Jubran et al. as evidenced by the instant specification as discussed above (see 102 and 103). Therefore, the patent claims render obvious of the present claims in view of Wong and Jubran. New Grounds of Rejection are necessitated by Applicant’s amendment, filed 10/07/2025. Claims 22-51 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over the following in view of Wong et al. (NEJM March 2021; 384:818-828; including the Protocol and Supplemental Appendix made available with the full text of the Wong article at NEJM.org) in view of Jubran (Critical Care 2015; 19:272). Co-pending application Claims USSN 17104864 claims 16, 18, 19, 27, 31-43 USSN 17340765 claims 1-48 USSN 17976502 Claims 1-27 USSN 17976603 Claims 1, 3, 5, 7-24 USSN 17976606 Claims 9-12, 16, 17, 19, 20, 24, 27, 28, 30-32 USSN 19213363 Claims 1-21 USSN 18783546 Claims 1-4 USSN 17587442 claims 1-19 USSN 18431587 Claims 17-46 USSN 18783572 Claims 13-42 The copending claims disclosed methods of treating comprising administering terlipressin in adults with HRS and obtaining SpO2, assessing an ACLF grade, monitoring SpO2 level and/or assessing SCr. Therefore, the reference copending claims would render obvious of the present claims in view of Wong et al., and Jubran et al. (see 102 and 103). This is a provisional nonstatutory double patenting rejection. 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 SHARON X WEN whose telephone number is (571)270-3064. The examiner can normally be reached Mon-Fri 8-5. 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, Misook Yu can be reached at 571-272-0839. 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. /SHARON X WEN/Primary Examiner, Art Unit 1641
Read full office action

Prosecution Timeline

May 20, 2025
Application Filed
Nov 13, 2025
Non-Final Rejection — §102, §103, §DP
Dec 15, 2025
Examiner Interview Summary
Dec 22, 2025
Response Filed
Feb 05, 2026
Final Rejection — §102, §103, §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

3-4
Expected OA Rounds
57%
Grant Probability
88%
With Interview (+31.5%)
3y 9m
Median Time to Grant
Moderate
PTA Risk
Based on 613 resolved cases by this examiner. Grant probability derived from career allow rate.

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