Prosecution Insights
Last updated: May 29, 2026
Application No. 18/260,556

ROR1 BINDING PROTEIN AND USE THEREOF

Non-Final OA §112§DP
Filed
Jul 06, 2023
Priority
Mar 09, 2021 — CN 202110255430.8 +1 more
Examiner
SULLIVAN, DENNIS JOHN
Art Unit
1642
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Klus Pharma Inc.
OA Round
1 (Non-Final)
61%
Grant Probability
Moderate
1-2
OA Rounds
9m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allowance Rate
64 granted / 105 resolved
+1.0% vs TC avg
Strong +50% interview lift
Without
With
+49.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
44 currently pending
Career history
153
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
48.9%
+8.9% vs TC avg
§102
0.9%
-39.1% vs TC avg
§112
10.6%
-29.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 105 resolved cases

Office Action

§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 . DETAILED ACTION Priority Applicant’s claim for the benefit of a prior-filed application under 35 U.S.C. 119(e) or under 35 U.S.C. 120, 121, 365(c), or 386(c) is acknowledged. Claims 1-24, and 28-39 have an effective filing date of 09MAR2021. Information Disclosure Statement The information disclosure statements (IDS) submitted on 07/06/2023 and 03/04/2025 are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. Election/Restriction In the response filed on 09MAR2026, Applicant elected, without traverse: Group I, claims 1-24, and 33-36 Species Antibody 19F6-Hu35V1 comprising SEQ ID NOs: 86 and 92 No mutations Humanized IgG1 Fab Fluorescent dye EC50 of less than 100nM Anti-EGFR antibody Status of Claims Claims 1-24, and 28-39 are currently pending and presented for examination on the merits. Claims 28-32, and 37-39 are withdrawn from further consideration by Examiner under 37 CFR 1.142(b) as being drawn to a non-elected invention. Claims 25-27 are canceled. Claims 3-12, 14-18, 20-22, 24, 28, and 30-32 are amended. Claims 33-39 are new. 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. Claims 1-7, 9-24, and 33-36 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. One of ordinary skill in the art would recognize that the specificity of an antibody is dependent upon the 6 CDR regions and different combinations of CDR sequences greatly alter antigen binding. Regarding the elected species, the instant specification discloses an antagonist antibody of ROR1 comprising the VH and VL of SEQ ID Nos: 86 and 92, respectively. However, the specification does not adequately describe, for example, a genus of antibodies SEQ ID NOs: 86 or 92, as recited in the instant claim 1. The specification also fails to describe antibodies within the claimed genus that have variable amino acid residues in the CDRs. It is well established in the art that the formation of an intact antigen-binding site generally requires the association of the complete heavy and light chain variable regions of a given antibody, each of which consists of three CDRs which provide the majority of the contact residues for the binding of the antibody to its target epitope. The amino acid sequences and conformations of each of the heavy and light chain CDRs are critical in maintaining the antigen binding specificity and affinity which is characteristic of the parent immunoglobulin. It is expected that all of the heavy and light chain CDRs in their proper order and in the context of framework sequences which maintain their required conformation, are required in order to produce a protein having antigen-binding function and that proper association of heavy and light chain variable regions is required in order to form functional antigen binding sites. Even minor changes in the amino acid sequences of the heavy and light variable regions, particularly in the CDRs, may dramatically affect antigen-binding function as evidenced by Rudikoff et al. (Proceedings of the National Academy of Sciences, 1982, 79:1979-1983). Rudikoff et al. teach that the alteration of a single amino acid in the CDR of a phosphocholine-binding myeloma protein resulted in the loss of antigen-binding function. MacCallum et al. (Journal of Molecular Biology, 1996, 262:732-745) analyzed many different antibodies for interactions with antigen and state that although CDR3 of the heavy and light chain dominates, a number of residues outside the standard CDR definitions make antigen contacts (see page 733, right column) and non-contacting residues within the CDRs coincide with residues as important in defining canonical backbone conformations (see page 735, left column). The fact that not just one CDR is essential for antigen binding or maintaining the conformation of the antigen binding site is underscored by Casset et al. (Biochemical and Biophysical Research Communications, 2003, 307:198-205), which constructed a peptide mimetic of an anti-CD4 monoclonal antibody binding site by rational design and the peptide was designed with 27 residues formed by residues from 5 CDRs (see entire document). Casset et al. also states that although CDR H3 is at the center of most if not all antigen interactions, other CDRs play an important role in the recognition process (page 199, left column) and this is demonstrated in this work by using all CDRs except CDR L2 and additionally using a framework residue located just before the CDR H3 (see page 202, left column). Holm et al. (Molecular Immunology, 2007:1075-1084) describes the mapping of an anti-cytokeratin antibody and found that in addition to the involvement of the residues in the CDR3 of the heavy chain in antigen binding, a residue in CDR2 of the light chain was also involved (abstract). Chen et al. (Journal of Molecular Biology, 1999, 293:865-881) describe high affinity variant antibodies binding to VEGF wherein the results show that the antigen binding site is almost entirely composed of residues from heavy chain CDRs, CDR-H1, H2, H3 (page 866). There is insufficient evidence or nexus that would lead the skilled artisan to predict the ability of an antibody to bind to ROR1 comprising fewer than 6 CDR regions of an antibody known to bind ROR1. Applicant is informed that the rejection of the claims under 35 U.S.C. 112(a) may be overcome by amending the claims to recite antibody species that comprise three HCDRs and three LCDRs. 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 1-12, 15-16, 18-24, and 33-36 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 9, 11, and 14 of copending Application No. 18/558,201 ('201) (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because: Claim 1 is not patentably distinct from claims 9, 11, and 14 of application ‘201. Specifically, an antibody comprising SEQ ID NOs: 86 and 92. A comparison of instant SEQ ID NO: 86 and SEQ ID NO: 1 of ‘201 is shown below. Instant SEQ ID NO: 86 and SEQ ID NO: 1 of ‘201. Query Match 100.0%; Score 623; Length 118; Best Local Similarity 100.0%; Matches 118; Conservative 0; Mismatches 0; Indels 0; Gaps 0; Qy 1 QVQLQESGPGLVKPSQTLSLTCTVSGYSITSDYAWNWIRQFPGKGLEWIGYISYSGSIRY 60 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 1 QVQLQESGPGLVKPSQTLSLTCTVSGYSITSDYAWNWIRQFPGKGLEWIGYISYSGSIRY 60 Qy 61 NPSLKSRVTISRDTSKNQFSLKLSSVTAADTAVYYCARGEITYYFDYWGQGTLVTVSS 118 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 61 NPSLKSRVTISRDTSKNQFSLKLSSVTAADTAVYYCARGEITYYFDYWGQGTLVTVSS 118 Additionally, a comparison of instant SEQ ID NO: 92 and SEQ ID NO: 2 of ‘201 is shown below. Instant SEQ ID NO: 92 and SEQ ID NO: 2 of ‘201. Query Match 100.0%; Score 567; Length 107; Best Local Similarity 100.0%; Matches 107; Conservative 0; Mismatches 0; Indels 0; Gaps 0; Qy 1 ETTLTQSPAFMSATPGDKVTISCKASTSIDDDMNWYQQKPGEPPKLIISEGNTLRPGIPP 60 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 1 ETTLTQSPAFMSATPGDKVTISCKASTSIDDDMNWYQQKPGEPPKLIISEGNTLRPGIPP 60 Qy 61 RFSSSGYGTDFTFTINKIKSEDAATYYCLQSNDLPLTFGQGTKLEIK 107 ||||||||||||||||||||||||||||||||||||||||||||||| Db 61 RFSSSGYGTDFTFTINKIKSEDAATYYCLQSNDLPLTFGQGTKLEIK 107 This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-12, 15-16, 18-24, and 33-36 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 11 and 12 of copending Application No. 18/559,039 ('039) (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because: Claim 1 is not patentably distinct from claims 11 and 12 of application ‘039. Specifically, the antibody 19F6-Hu35V1 that comprises SEQ ID NOs: 86 and 92. Applicant states in the instant specification that antibody 19F6-Hu35V1 comprises SEQ ID NOs: 86 and 92 [Sequence Information, pg. 76]. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-12, 15-16, 18-24, and 33-36 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 30 and 33 of copending Application No. 19/125,354 ('354) (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because: Claim 1 is not patentably distinct from claims 30 and 33 of application ‘354. Specifically, an antibody comprising SEQ ID NOs: 86 and 92. A comparison of instant SEQ ID NO: 86 and SEQ ID NO: 1 of ‘201 is shown below. Instant SEQ ID NO: 86 and SEQ ID NO: 1 of ‘201. Query Match 100.0%; Score 623; Length 118; Best Local Similarity 100.0%; Matches 118; Conservative 0; Mismatches 0; Indels 0; Gaps 0; Qy 1 QVQLQESGPGLVKPSQTLSLTCTVSGYSITSDYAWNWIRQFPGKGLEWIGYISYSGSIRY 60 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 1 QVQLQESGPGLVKPSQTLSLTCTVSGYSITSDYAWNWIRQFPGKGLEWIGYISYSGSIRY 60 Qy 61 NPSLKSRVTISRDTSKNQFSLKLSSVTAADTAVYYCARGEITYYFDYWGQGTLVTVSS 118 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 61 NPSLKSRVTISRDTSKNQFSLKLSSVTAADTAVYYCARGEITYYFDYWGQGTLVTVSS 118 Additionally, a comparison of instant SEQ ID NO: 92 and SEQ ID NO: 2 of ‘201 is shown below. Instant SEQ ID NO: 92 and SEQ ID NO: 2 of ‘201. Query Match 100.0%; Score 567; Length 107; Best Local Similarity 100.0%; Matches 107; Conservative 0; Mismatches 0; Indels 0; Gaps 0; Qy 1 ETTLTQSPAFMSATPGDKVTISCKASTSIDDDMNWYQQKPGEPPKLIISEGNTLRPGIPP 60 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Db 1 ETTLTQSPAFMSATPGDKVTISCKASTSIDDDMNWYQQKPGEPPKLIISEGNTLRPGIPP 60 Qy 61 RFSSSGYGTDFTFTINKIKSEDAATYYCLQSNDLPLTFGQGTKLEIK 107 ||||||||||||||||||||||||||||||||||||||||||||||| Db 61 RFSSSGYGTDFTFTINKIKSEDAATYYCLQSNDLPLTFGQGTKLEIK 107 This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DENNIS JOHN SULLIVAN whose telephone number is (571)272-0509. The examiner can normally be reached Mon - Fri: 7:30AM - 4:30PM. 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, Samira Jean-Louis can be reached at (571) 270-3503. 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. /DENNIS J SULLIVAN/Examiner, Art Unit 1642 /NELSON B MOSELEY II/Primary Examiner, Art Unit 1642
Read full office action

Prosecution Timeline

Jul 06, 2023
Application Filed
May 20, 2026
Non-Final Rejection mailed — §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
61%
Grant Probability
99%
With Interview (+49.9%)
3y 8m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 105 resolved cases by this examiner. Grant probability derived from career allowance rate.

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