Prosecution Insights
Last updated: October 01, 2026
Application No. 18/719,598

HYALURONIC ACID DERIVATIVE HAVING A REDUCED POLARITY, METHOD OF PREPARATION THEREOF, COMPOSITION AND USE THEREOF

Non-Final OA §112
Filed
Jun 13, 2024
Priority
Dec 14, 2021 — CZ PV2021-563 +1 more
Examiner
MCINTOSH III, TRAVISS C
Art Unit
Tech Center
Assignee
Contipro A S
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
1m
Est. Remaining
87%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
977 granted / 1334 resolved
+13.2% vs TC avg
Moderate +14% lift
Without
With
+14.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
33 currently pending
Career history
1355
Total Applications
across all art units

Statute-Specific Performance

§101
6.1%
-33.9% vs TC avg
§103
16.0%
-24.0% vs TC avg
§102
23.4%
-16.6% vs TC avg
§112
32.0%
-8.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1334 resolved cases

Office Action

§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 . Information Disclosure Statement The information disclosure statement filed 5/26/2026 fails to comply with 37 CFR 1.98(a)(2), which requires a legible copy of each cited foreign patent document; each non-patent literature publication or that portion which caused it to be listed; and all other information or that portion which caused it to be listed. It has been placed in the application file, but the information referred to therein has not been considered. It is noted the NPL references lined through have not been supplied to the Office in their entirety. Most of these lined-through references were submitted with only a portion of the abstract, and not the entire document as required. As such, the references lined through have not been considered. 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 11-22 are 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 11 is drawn to a compound of formula I: PNG media_image1.png 32 188 media_image1.png Greyscale where A is linked to B which are both linked to additional R-groups (R1 and R2). Compounds A and B are depicted as follows: PNG media_image2.png 196 408 media_image2.png Greyscale and PNG media_image3.png 184 362 media_image3.png Greyscale . It is unclear where (B) would be connected to (A) as (A) has two squiggly lines indicating attachment points, however compound (B) only has one attachment point indicated with a squiggly line and also is depicted as having a methyl group attached to the 4-position of the 1st sugar in the disaccharide. The examiner believes this “methyl group” is actually the attachment point to the adjacent disaccharide and instead should be depicted structurally as: PNG media_image4.png 190 358 media_image4.png Greyscale . Clarity is respectfully requested. 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). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. The closest prior art is seen to be US2005/0203056 who discloses carboxyl-reduced derivatives of HA having the formula: PNG media_image5.png 96 244 media_image5.png Greyscale or PNG media_image6.png 104 244 media_image6.png Greyscale (see abstract and page 5), but these compounds are not embraced herein as they would contain 100% carboxyl-reduced monomers wherein the present application would require reduced and non-reduced monomers as group B is required to be present in the claims herein (wherein the ratio of X/Y (which is the groups A/B) is in the range from 3/1 to 1/4 and would not be present in ‘056. Likewise, Onodera et al., Agriculture and Biological Chemistry, vol. 27(2), pp 143-149, 1963 (NPL reference 5 from applicants IDS filed 5/26/26) discloses various carboxyl-reduced heparins which are subsequently methylated, which would not be embraced herein. 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
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Prosecution Timeline

Jun 13, 2024
Application Filed
Aug 05, 2026
Non-Final Rejection mailed — §112
Sep 21, 2026
Interview Requested

Precedent Cases

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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 (~1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1334 resolved cases by this examiner. Grant probability derived from career allowance rate.

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