Prosecution Insights
Last updated: July 17, 2026
Application No. 17/563,780

FORMULATIONS OF ACTIVATING ANTIGEN CARRIERS

Final Rejection §112
Filed
Dec 28, 2021
Priority
Dec 29, 2020 — provisional 63/131,457
Examiner
CHEN, STACY BROWN
Art Unit
1672
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
STEMCELL Technologies Canada Inc.
OA Round
4 (Final)
66%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
610 granted / 926 resolved
+5.9% vs TC avg
Strong +40% interview lift
Without
With
+40.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
42 currently pending
Career history
973
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
43.3%
+3.3% vs TC avg
§102
7.8%
-32.2% vs TC avg
§112
19.8%
-20.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 926 resolved cases

Office Action

§112
DETAILED ACTION Applicant's amendment and remarks filed on April 15, 2026 has been entered. Any prior objection or rejection that is not repeated or addressed below is either moot or withdrawn in view of Applicant’s amendment. All prior art rejections over Ditommaso et al. (US 2019/0017072 A1, “Ditommaso”) in view of McGann et al. (US 2006/0063141 A1, “McGann”) and Crowe et al. (US 2002/0114791 A1, “Crowe”) are withdrawn upon further consideration. Applicant’s arguments filed April 15, 2026 have been considered. Applicant’s arguments regarding the Crowe reference has been found persuasive and is acknowledged below. Ditommaso’s cells have been constricted and perturbed such that an antigen/adjuvant complex enters the pores of the cells (see paragraph [0031]). McGann suggests cryopreservation of any kind of cell, however, Ditommaso’s cells have been perturbed, thus their integrity and how they are impacted by cryopreservation and DMSO is not so predictable that one would have had a reasonable expectation of success of the claimed yield of intact cells post-thaw. Crowe’s teachings are directed to lyophilized cells, in contrast to Ditommaso’s cells that are not lyophilized. Therefore, the rejections over Ditommaso, McGann and Crowe are withdrawn. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. (New Rejection) Claims 1, 10, 16, 20, 22, 23, 30, 32, 35, 39, 42 and 47 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. This is a new matter rejection. Claims 1 and 10 recite, “hypoosmotic conditions” and “hyperosmotic conditions”. Paragraph [0169] of the published application (US 20220233676) provides support for “hypotonic” and “hypertonic”, but not “hypoosmotic conditions” and “hyperosmotic conditions”. Paragraph [0169] also discloses maintaining osmolarity, but that is not support for the embodiment of the absence of “hypoosmotic conditions” and “hyperosmotic conditions” since the starting osmolarity is not stated. Conclusion Claims 60-62, 66 and 75 are allowable. 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. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Stacy B. Chen whose telephone number is 571-272-0896. The examiner can normally be reached on M-F (7:00-4:30). If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Thomas Visone, can be reached on 571-270-0684. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. /STACY B CHEN/Primary Examiner, Art Unit 1672
Read full office action

Prosecution Timeline

Show 2 earlier events
Sep 23, 2025
Response Filed
Oct 24, 2025
Final Rejection mailed — §112
Dec 12, 2025
Response after Non-Final Action
Jan 08, 2026
Request for Continued Examination
Jan 14, 2026
Response after Non-Final Action
Jan 20, 2026
Non-Final Rejection mailed — §112
Apr 15, 2026
Response Filed
Jul 07, 2026
Final Rejection mailed — §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
66%
Grant Probability
99%
With Interview (+40.5%)
3y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 926 resolved cases by this examiner. Grant probability derived from career allowance rate.

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