Prosecution Insights
Last updated: September 17, 2026
Application No. 18/706,441

Monoclonal Antibodies Against Carcinoembryonic Antigens, and Their Uses

Non-Final OA §DP
Filed
May 01, 2024
Priority
Nov 05, 2021 — provisional 63/275,998 +2 more
Examiner
NICKOL, GARY B
Art Unit
1642
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Mab Biotec Inc.
OA Round
1 (Non-Final)
48%
Grant Probability
Moderate
1-2
OA Rounds
1y 4m
Est. Remaining
77%
With Interview

Examiner Intelligence

Grants 48% of resolved cases
48%
Career Allowance Rate
33 granted / 69 resolved
-12.2% vs TC avg
Strong +30% interview lift
Without
With
+29.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
53 currently pending
Career history
110
Total Applications
across all art units

Statute-Specific Performance

§101
3.3%
-36.7% vs TC avg
§103
22.6%
-17.4% vs TC avg
§102
22.3%
-17.7% vs TC avg
§112
37.2%
-2.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 69 resolved cases

Office Action

§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 . Claims 29-31, 33, 36-42, 51, 60-61, and 74-79 are pending and under consideration. 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 29-31, 33, 36-42, 51, 60-61, and 74-79 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-5 of U.S. Patent No. 11774452 (Applicant’s IDS). Although the claims at issue are not identical, they are not patentably distinct from each other because the patented claims are drawn to same anti-CEA antibody as used in the method claims of the current application. Claim 1 of the patent is drawn to: An isolated antibody or antibody fragment comprising, an (a) HCDR1 comprising the amino acid sequence of SEQ ID NO: 1; (b) HCDR2 comprising the amino acid sequence of SEQ ID NO: 2; (c) HCDR3 comprising the amino acid sequence of SEQ ID NO: 3; (d) LCDR1 comprising the amino acid sequence of SEQ ID NO: 4; (e) LCDR2 comprising the amino acid sequence of SEQ ID NO: 5; and (f) LCDR3 comprising the amino acid sequence of SEQ ID NO: 6. Heavy Chain CDRs of US 11774452 GFSLTSNG- SEQ ID NO:1 IWAGGNT- SEQ ID NO:2 ARDDGYYYAMDY- SEQ ID NO:3 Light Chain CDRs of US 11774452 QDINKY-SEQ ID NO:4 YTS- SEQ ID NO:5 LQYDNT- SEQ ID NO:6 The above HCDRs and LCDRs are identical to those used in the methods of detecting cancer, and determining the status of a solid tumor, and methods of treating a cancer as currently claimed. The portion of the specification of the reference (e.g., the patent) that describes subject matter that falls within the scope of a reference claim may be relied upon to properly construe the scope of that claim. In particular, when ascertaining the scope of the reference’s claim(s) to a compound, the examiner should consider the reference’s specification, including all of the compound’s uses that are disclosed. See Sun Pharm. Indus., 611 F.3d at 1386-88, 95 USPQ2d at 1801-02. As such, the patent clearly teaches methods of detecting and treating solid tumors such as colorectal cancer, liver cancer, stomach cancer, ovarian cancer, thyroid cancer, lung cancer, breast cancer or pancreatic cancer. See column 7, lines 54+ and column 8, lines 8+. Patented Claim 3 is drawn to: The isolated antibody or antibody fragment of claim 1, wherein the antibody is a monoclonal antibody, a fully human antibody, or an antibody fragment selected from a Fab, Fab′, Fv, scFv and (Fab′)2. While the current claims do not specify the structure of the antibody, they are broadly drawn to antibodies comprising a variable heavy region and a variable light region (SEQ IDs 7 and 8) and/or antibody fragments thereof which would encompass a monoclonal antibody or well-known and obvious fragments such as Fab, Fab’, Fv, scFv and (Fab’)2. Patented Claim 5 is drawn to: A kit for the immunohistochemical detection of a solid tumor cancer comprising cells expressing a CEA antigen comprising: (a) an antibody according to claim 1; and (b) a secondary antibody conjugated to a detectable label, wherein the secondary antibody binds to and is capable of detecting the antibody of (a) when bound to a CEA antigen. This is similar in scope to currently pending claim 60 drawn to a composition comprising a tissue specimen and an antibody complex between the claimed anti-CEA antibody of Claim 1 and a CEA antigen. While the claim does not include a secondary antibody, it would be obvious to include a detectable label for the purpose of visualizing the anti-CEA antibody complex. Also, pending Claim 33 includes the labeling of specimens. No claim is allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to GARY B NICKOL, Ph.D. whose telephone number is (571)272-0835. The examiner can normally be reached M-F 9AM-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, Julie Wu can be reached at 571-272-5205. 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. /GARY B NICKOL/Primary Examiner, Art Unit 1643
Read full office action

Prosecution Timeline

May 01, 2024
Application Filed
Sep 11, 2026
Non-Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12735466
COMBINATION IMMUNOTHERAPY
4y 8m to grant Granted Sep 15, 2026
Patent 12729370
T CELL RECEPTORS SPECIFIC FOR A MUTANT FORM OF THE RET ONCOGENE AND USES THEREOF
3y 3m to grant Granted Sep 08, 2026
Patent 12728140
TROJAN CIRCULATING TUMOR CELLS
2y 10m to grant Granted Sep 08, 2026
Patent 12723102
COMPOSITION FOR DIFFERENTIAL DIAGNOSIS OF ACANTHAMOEBA KERATITIS COMPRISING CHORISMATE MUTASE PROTEIN ANTIBODIES, AND ACANTHAMOEBA KERATITIS DIAGNOSIS KIT USING SAME
4y 0m to grant Granted Sep 01, 2026
Patent 12703757
ANTI-HVEM ANTIBODIES
2y 11m to grant Granted Aug 11, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
48%
Grant Probability
77%
With Interview (+29.5%)
3y 9m (~1y 4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 69 resolved cases by this examiner. Grant probability derived from career allowance 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