Prosecution Insights
Last updated: April 19, 2026
Application No. 18/043,613

METHODS TO STIMULATE HLA-AGNOSTIC IMMUNE RESPONSES TO PROTEINS USING NUCLEATED CELLS

Non-Final OA §102§103
Filed
Mar 01, 2023
Examiner
BOESEN, AGNIESZKA
Art Unit
1672
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
STEMCELL Technologies Canada Inc.
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
3y 4m
To Grant
90%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allow Rate
555 granted / 816 resolved
+8.0% vs TC avg
Strong +22% interview lift
Without
With
+22.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
31 currently pending
Career history
847
Total Applications
across all art units

Statute-Specific Performance

§101
6.9%
-33.1% vs TC avg
§103
31.6%
-8.4% vs TC avg
§102
20.7%
-19.3% vs TC avg
§112
21.3%
-18.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 816 resolved cases

Office Action

§102 §103
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 . Election/Restrictions Applicant's election with traverse of Group I, claims 82, 83, 88, 104, 106 and 121 in the reply filed on January 16, 2026 is acknowledged. The traversal is on the ground(s) that the nucleated cells comprising the mRNA encoding a protein are not a special technical feature over WO2019/178005). Applicant’s argument has been found persuasive in part. Due to the claim amendment, the restriction requirement between groups I and II is withdrawn. Claims 82, 83, 88, 92, 96, 98, 99, 104, 106, 121, and 133 are under examination in this Office action. Claims 154, 156, 178, 180, 194, 197, 213, 289, and 290 are withdrawn as being drawn to non-elected invention. Information Disclosure Statement The information disclosure statement (IDS) submitted on November 18, 2025 has been considered by the examiner. 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. Claims 82, 92, 96, 98, 99, 104, 106, 121, and 133 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Sharei et al. (WO 2016/070136 A1). Regarding present claims 82, 92, 96, 98, 104, 106, 121 and 133. Sharei et al. disclose compositions comprising nucleated cells, PBMCs, comprising a protein or an mRNA encoding the protein of HPV (see Table on page 37, wherein the immune response is generated in an HLA agnostic manner with mRNA encoding the full-length protein (see claims 1-20, page 3, page 20 and 23). Regarding present claim 99. Sharein et al. disclose SLP, synthetic long peptide of the oncogenes E6 and E7 of the HPV16 (see pages 16-17 and 65). Thus, by this disclosure Sharei et al. anticipate the present claims. 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. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claims 83, and 88 are rejected under 35 U.S.C. 103 as being unpatentable over Sharei et al. (WO 2016/070136 A1), as applied to claim 82 and further in view of Liang et al. (bioRxiv, 2019, p. 1-47). Sherai et al. teach the claimed invention as disused above. Sherai does not teach immunoproteasome targeting motif such as MITD domain. Liang et al. teach that immunoproteasome targeting motif such as MITD domain linked to the C-terminal of the peptide of interest, has been shown to strongly improve the presentation of the MHC class I and class II epitopes (see page 15 and Figure 1). It would have been prima facie obvious to provide the composition of Sharei et al. wherein the protein fragment further comprises Liang’s immunoproteasome targeting motif such as MITD domain linked to the C-terminal of the HPV peptide, because immunoproteasome targeting motif such as MITD domain linked to the C-terminal of the peptide of interest, has been shown to strongly improve the presentation of the MHC class I and class II epitopes (see Liang on page 15 and Figure 1). Thus, the present invention would have been prima facie obvious at the time the invention was made. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to AGNIESZKA BOESEN whose telephone number is (571)272-8035. The examiner can normally be reached on 8:30 - 5:00 PM. 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, 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. 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. /AGNIESZKA BOESEN/Primary Examiner, Art Unit 1648
Read full office action

Prosecution Timeline

Mar 01, 2023
Application Filed
Feb 07, 2026
Non-Final Rejection — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12599660
THERAPEUTIC RNA FOR HPV-POSITIVE CANCER
2y 5m to grant Granted Apr 14, 2026
Patent 12589143
HUMAN ANTI-PD-L1 PEPTIDE VACCINES AND METHODS OF THEIR USE
2y 5m to grant Granted Mar 31, 2026
Patent 12569553
SHINGLES VACCINES COMPRISING A TLR9 AGONIST
2y 5m to grant Granted Mar 10, 2026
Patent 12552854
PEPTIDES THAT BLOCK PRESENTATION OF ANTIGENIC ISLET PEPTIDES BY HLA-DQ8 AND METHODS FOR TREATING TYPE-1 DIABETES
2y 5m to grant Granted Feb 17, 2026
Patent 12551550
COMPOSITIONS AND VACCINES FOR TREATING AND/OR PREVENTING CORONAVIRUS VARIANT INFECTIONS AND METHODS OF USING THE SAME
2y 5m to grant Granted Feb 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
68%
Grant Probability
90%
With Interview (+22.5%)
3y 4m
Median Time to Grant
Low
PTA Risk
Based on 816 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month