Prosecution Insights
Last updated: April 19, 2026
Application No. 18/047,865

BIOACTIVE POLYMERS FOR OPHTHALMIC APPLICATIONS

Non-Final OA §102§103
Filed
Oct 19, 2022
Examiner
BLAND, ALICIA
Art Unit
1759
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Key Medical Technologies Inc.
OA Round
1 (Non-Final)
50%
Grant Probability
Moderate
1-2
OA Rounds
3y 2m
To Grant
62%
With Interview

Examiner Intelligence

Grants 50% of resolved cases
50%
Career Allow Rate
347 granted / 700 resolved
-15.4% vs TC avg
Moderate +12% lift
Without
With
+11.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
40 currently pending
Career history
740
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
45.2%
+5.2% vs TC avg
§102
18.9%
-21.1% vs TC avg
§112
21.7%
-18.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 700 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 without traverse of Group I, collagen, methacrylic acid, refractive index 1.5, not hydrated, hydroxyethyl methacrylate, 2-(2’-methacryloxy-5’methylphenyl)benzotriazole, ethyeneglycol dimethacrylate in the reply filed on 12/12/25 is acknowledged. Claims 7-9, 15-17, 19-20 withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected group/species, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 12/12/25. Priority The claims have an effective date of the provisional application filed 10/22/21 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. Claim(s) 1-6, 10-14 is/are rejected under 35 U.S.C. 102a1 as being anticipated by Phopase (EP 6043835). Phopase discloses transparent hydrogel compositions (title). Reference Example 2 [0061-0063] discloses methacrylation of collagen wherein collagen [meeting the bioactive agent of claim 1] is reacted with methacrylic anhydride [meeting the moiety of claim 1] to form MA-collagen [meeting the bioactive monomer of claim 1]. Reference Example 3 [0066] discloses mixing the MA-collagen with monomers such as the elected hydroxyethyl methacrylate [meeting the other monomers of claim 1] and reacting via exposure to UV to form a polymer gel [meeting the performing a copolymerization, and, the manufacturing of a bioactive polymer]. Elements above meet claim 1. Elements above also meet claim 2 since this polymer is an acrylate (a type of an acrylic polymer). Collagen meets claims 3-5 and hydroxyethyl methacrylate, as above, meets claim 6. The methacrylic anhydride is an alkenyl moiety, thus elements above meet claim 10. Elements above further meet claims 11-14. Claim(s) 1-3, 6, 10-14 is/are rejected under 35 U.S.C. 102a1 as being anticipated by Sanyal (US 2019/0321479). Sanyal discloses cleavable polymer drug composites (title). Said composites are exemplified, see Example 2 wherein docetaxel [meeting a bioactive agent] is conjugated to a methacrylate moiety [meeting the moiety] to produce a docetaxel-MA monomer [meeting the bioactive monomer]. Example 3 copolymerizes the docetaxel-MA with polyethylene glycol methyl ether methacrylate PEGMEMA [meeting the other monomer lacking a bioactive agent], the copolymer thereof meets the bioactive polymer of claim 1. The end copolymer is an acrylic polymer, as required by claim 2, and docetaxel is a therapeutic agent, as required by claim 3. Alternatively, proteins may be attached to the monomer [0051]. Choosing one element from a list is still deemed anticipated, thus alternatively anticipating claim 3. The PEGMEMA is a methacrylate compound, as required by claim 6. The methacrylate portion of the Docetaxel-MA of Ex 2 meets the first alkenyl moiety of claim 10, the other elements thereof already discussed above. Elements above further meet claims 11-12. The PEGMEMA is an acrylate ester, as required by claim 13 and is also a methacrylate compound as required by claim 14. 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 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. Claim(s) 18 is/are rejected under 35 U.S.C. 102(a1) as anticipated by or, in the alternative, under 35 U.S.C. 103 as obvious over Phopase. Phopase includes elements as set forth above. Phospase exemplifies and embraces the same monomers as instantly claimed (hydroxyethyl methacrylate and MA-collagen), thus the refractive index of the claims is expected to be met or embraced by the reference. If there is any difference between the product of the reference and the product of the instant claims the difference would have been minor and obvious. "Products of identical chemical composition can not have mutually exclusive properties." A chemical composition and its properties are inseparable. Therefore, if the prior art teaches the identical chemical structure, the properties applicant discloses and/or claims are necessarily present. See MPEP 2112.01(I) , In re Best, 562 F2d at 1255, 195 USPQ at 433, Titanium Metals Corp v Banner, 778 F2d 775, 227 USPQ 773 (Fed Cir 1985), In re Ludtke, 441 F2d 660, 169 USPQ 563 (CCPA 1971) and Northam Warren Corp v D F Newfield Co, 7 F Supp 773, 22 USPQ 313 (EDNY 1934). Where applicant claims a composition in terms of a function, property or characteristic and the composition of the prior art is the same as that of the claim but the function is not explicitly disclosed by the reference, the examiner may make a rejection under both 35 USC 102 and 103. "There is nothing inconsistent in concurrent rejections for obviousness under 35 USC 103 and for anticipation under 35 USC 102." See MPEP 2112(III) and In re Best, 562 F2d at 1255, 195 USPQ at 433. Claim(s) 18 is/are rejected under 35 U.S.C. 102(a1) as anticipated by or, in the alternative, under 35 U.S.C. 103 as obvious over Sanyal. Sanyal includes elements as set forth above. Sanyal exemplifies and embraces monomers of the same genus of that as instantly claimed (various acrylates), thus the refractive index of the claims is expected to be met or embraced by the reference. If there is any difference between the product of the reference and the product of the instant claims the difference would have been minor and obvious. "Products of identical chemical composition can not have mutually exclusive properties." A chemical composition and its properties are inseparable. Therefore, if the prior art teaches the identical chemical structure, the properties applicant discloses and/or claims are necessarily present. See MPEP 2112.01(I) , In re Best, 562 F2d at 1255, 195 USPQ at 433, Titanium Metals Corp v Banner, 778 F2d 775, 227 USPQ 773 (Fed Cir 1985), In re Ludtke, 441 F2d 660, 169 USPQ 563 (CCPA 1971) and Northam Warren Corp v D F Newfield Co, 7 F Supp 773, 22 USPQ 313 (EDNY 1934). Where applicant claims a composition in terms of a function, property or characteristic and the composition of the prior art is the same as that of the claim but the function is not explicitly disclosed by the reference, the examiner may make a rejection under both 35 USC 102 and 103. "There is nothing inconsistent in concurrent rejections for obviousness under 35 USC 103 and for anticipation under 35 USC 102." See MPEP 2112(III) and In re Best, 562 F2d at 1255, 195 USPQ at 433. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ALICIA BLAND whose telephone number is (571)272-2451. The examiner can normally be reached Mon - Fri 9:00 am -3:00 pm 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, Curt Mayes can be reached at 571-272-1234. 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. /ALICIA BLAND/ Primary Examiner, Art Unit 1759
Read full office action

Prosecution Timeline

Oct 19, 2022
Application Filed
Feb 11, 2026
Non-Final Rejection — §102, §103 (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
50%
Grant Probability
62%
With Interview (+11.9%)
3y 2m
Median Time to Grant
Low
PTA Risk
Based on 700 resolved cases by this examiner. Grant probability derived from career allow rate.

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