Prosecution Insights
Last updated: September 17, 2026
Application No. 18/832,561

LIGAND, METHOD FOR PREPARING SAME, AND USE THEREOF

Non-Final OA §102§103§112
Filed
Jul 24, 2024
Priority
Jan 30, 2022 — CN 202210114418.X +2 more
Examiner
MCINTOSH III, TRAVISS C
Art Unit
Tech Center
Assignee
Lnctac Co. Ltd.
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
3m
Est. Remaining
87%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
975 granted / 1331 resolved
+13.3% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
32 currently pending
Career history
1354
Total Applications
across all art units

Statute-Specific Performance

§101
6.1%
-33.9% vs TC avg
§103
15.8%
-24.2% vs TC avg
§102
23.4%
-16.6% vs TC avg
§112
32.1%
-7.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1331 resolved cases

Office Action

§102 §103 §112
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 . Claim Objections Claim 12 is objected to because of the following informalities: there should be an “and” between the last 2 members of the group B. There should also be an “and” before the phrase “w is an integer from 1 to 19”. Appropriate correction is required. Claim 13 is objected to because of the following informalities: there should be an “and” before the phrase “w is an integer from 1 to 19”. Appropriate correction is required. Claim 14 is objected to because of the following informalities: there should be an “or” between the last two compounds. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-2, 10-16, 18, and 21 rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1 is indefinite wherein the claim defines X, X1, X2, and Y as each a backbone structure in a triple branched form; however, there is no “X” group in the compounds as this was deleted when deleting formula I. As such, it is unclear what “X” is referring to. Claim1 is indefinite wherein the claim states: PNG media_image1.png 58 638 media_image1.png Greyscale As such, are a1, a2, a3, and a4 necessarily present based on the second line, or are they optionally absent as in the 1st line? The examiner believes the second line to read “wherein when a1, a2, a3, and a4 are present, a1 to a4 are selected from…”. Claim 11 is indefinite wherein the claim stats various requirements such as “where a1-4 are all present A1 and A2 are each…”; “where a1-4 are all absent, A1 and A2 are selected from…”; “where a1 and a2 are present…”; “where a3 and a4 are present….”. As such, the claim states various contradictory possible groupings but does not provide any alternatives for the groups as they must all be present. It is unclear what is intended by the claim. Claim 13 is indefinite wherein the claim comprises the variable M1 but there is no definition for this variable in the claim nor the claims from which it depends and thus it is unclear what is embraced by the claim. Claim 16 is indefinite wherein the claim is drawn to the use of the ligand of claim 1, but it is unclear what is being claimed as there are no additional structural features nor methodological steps required in the claim. Claim 18 is indefinite where the claim limits formula III in the 3rd to last line, but also deleted formula III from the claim. What is formula III? Claim 21 is indefinite wherein the claim contains multiple undefined variables. None of the T, T’, G, G’, X, Y, or Z groups are defined. Also, the claim states that a1-a4 are present in step 3, but there are no structures with these undefined variables present. All claims which depend from an indefinite claim are also indefinite. Ex parte Cordova, 10 U.S.P.Q. 2d 1949, 1952 (P.T.O. Bd. App. 1989). Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 2 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 2 provides various limitations to the compound of formula I of claim 1. However, formula I has been deleted and is not present in claim 1, and thus claim 2 cannot further limit claim 1 as it “limits” the cancelled portion of the claim. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Claim Rejections - 35 USC § 102 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 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. Claim(s) 1-2, 10-13, 15-16, 18, and 21 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by WO2019/027015. ‘015 discloses the compounds such as: PNG media_image2.png 214 322 media_image2.png Greyscale (see page 233), PNG media_image3.png 232 202 media_image3.png Greyscale (page 239) PNG media_image4.png 166 202 media_image4.png Greyscale (see page 123) and PNG media_image5.png 160 206 media_image5.png Greyscale on page 116 which anticipate the present compounds of formula II which require a central branching point which is linked to an additional two branching points which each have 2 tethers to the glycosyl ligands. The compounds have the same three branching-groups claimed herein, which are required to also each be triple-branching points. The compounds are taught to have the same conjugate linkers (see [0088] on pages 47-48) and tethers claimed herein (see compounds/species therein). Also – compound D7 above comprises the same (A-7) group of present claim 11. The methods of making are correlative to those methods claimed herein additionally. Claim(s) 1-2, 10-13, 15-16, 18, and 21 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by WO14/179629. ‘629 discloses compounds such as: PNG media_image6.png 322 418 media_image6.png Greyscale on page 234 which anticipate the present compounds of formula II which require a central branching point which is linked to an additional two branching points which each have 2 tethers to the glycosyl ligands. The compounds have the same three branching-groups claimed herein, which are required to also each be triple-branching points. The compounds are taught to have the same linkers claimed herein (see pages 55-64); the same branching groups (see pages 65-69); the same tethers claimed herein (see pages 70-72); and the same sugar ligands (see page 72-75). The methods of making the compounds therein are correlative to those methods claimed herein. 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. The factual inquiries 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. 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. Claim(s) 1-2, 10-16, 18, and 21 is/are rejected under 35 U.S.C. 103 as being unpatentable over WO2019/027015 as applied to claims 1-2, 10-13, 15-16, 18, and 21 above. The claims of the present application are drawn to various conjugate compounds comprise a cell targeting moiety which comprises a ligand (saccharide) attached to a tether where two tethers are linked to two different branches of a main branching group. Certain species include compounds such as: PNG media_image2.png 214 322 media_image2.png Greyscale on page 233. This compound is very similar to compound TEC07 claimed in claim 14 herein having the formula: PNG media_image7.png 334 512 media_image7.png Greyscale and appears to use various obvious modifications of the arts compounds to arrive at those presently claimed. Applicants have not shown anything unexpected or surprising about their compounds, and it is noted that unexpected results must be commensurate in scope with the present claims are represent the scope claimed. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TRAVISS C MCINTOSH III whose telephone number is (571)272-0657. The examiner can normally be reached Monday-Friday 9AM-5:30PM EST. 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, Scarlett Goon can be reached at 571-270-5241. 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. /TRAVISS C MCINTOSH III/Primary Examiner, Art Unit 1693
Read full office action

Prosecution Timeline

Jul 24, 2024
Application Filed
Sep 03, 2026
Non-Final Rejection mailed — §102, §103, §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

1-2
Expected OA Rounds
73%
Grant Probability
87%
With Interview (+14.0%)
2y 5m (~3m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1331 resolved cases by this examiner. Grant probability derived from career allowance rate.

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