Prosecution Insights
Last updated: April 19, 2026
Application No. 18/023,139

Resin and Preparation Method Therefor

Non-Final OA §103
Filed
Feb 24, 2023
Examiner
FROST, ANTHONY J
Art Unit
1782
Tech Center
1700 — Chemical & Materials Engineering
Assignee
LG Chem, Ltd.
OA Round
1 (Non-Final)
52%
Grant Probability
Moderate
1-2
OA Rounds
3y 10m
To Grant
73%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allow Rate
331 granted / 637 resolved
-13.0% vs TC avg
Strong +21% interview lift
Without
With
+20.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 10m
Avg Prosecution
45 currently pending
Career history
682
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
72.8%
+32.8% vs TC avg
§102
11.3%
-28.7% vs TC avg
§112
12.0%
-28.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 637 resolved cases

Office Action

§103
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . 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 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. Election/Restrictions Applicant’s election without traverse of Group I, claims 1-8 and 12-17, in the reply filed on 12/30/25 is acknowledged. Claims 9-11 and 18-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 12/30/25. 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. 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) 1-8 and 12-17 is/are rejected under 35 U.S.C. 103 as being unpatentable over Ishizuka et al. (US 2015/028954, “Ishizuka”) in view of Lee et al. (US 2006/0183878, “Lee”). Regarding claims 1 and 12 – 14, Ishizuka teaches a resin, that may be molded into an optical article ([0022], [0034], optical lens) including a polycarbonate compound (i.e., a monomeric unit having pendant groups reading on the claimed X1-Z1-X2 and X3-Z2-X4-L-C=O groups, see, e.g., [0036], compound of general formula (A); for use in an optical resin, [0002] - [0006]). Ishizuka teaches that such a compound may be formed from reaction of a dihydroxy precursor ([0049] – [0052], and may include fluorine). PNG media_image1.png 190 314 media_image1.png Greyscale Ishizuka fails to teach the claimed structure because Ishizuka fails to teach a single substituted medial aryl group. However, in the same field of endeavor of optical resin applications ([0001] – [0010]), Lee teaches a terphenyl monomeric compound having a dihydroxy group and that such a compound may help to reduce steric hindrance and thus be more readily produced and be useful in the production of materials for use in optical applications (e.g., [0001] – [0010], [0048]). It therefore would have been obvious to the person of ordinary skill in the art at the time of filing have substituted a medial terphenyl group in the polycarbonate compound of Ishizuka (or to have used the terphenyl compound in a polycarbonate, consistent with the teachings of Ishizuka) at the very least as an attempt to harness its ability to reduce steric hindrance and thus be more readily produced and its usefulness in the production of materials for use in optical applications (e.g., [0001] – [0010], [0048]). PNG media_image2.png 204 302 media_image2.png Greyscale Regarding claim 2, modified Ishizuki additionally teaches the medial benzene ring need not have a group corresponding to R1 (see Lee, [0046]). Regarding claim 3, modified Ishizuka additionally teaches that the groups corresponding to Ar1 and Ar2 may be substituted aryl groups having 6 to 12 carbons (see Lee, [0046]). Regarding claim 4, Ishizuka additionally teaches that the groups corresponding to the claimed Z1 and Z2 groups may be alkylene groups having from 1 to 4 carbon atoms (see Ishizuka, [0036]). Regarding claim 5, Ishizuka additionally teaches that the groups corresponding to the claimed X1 and X4 may be oxygens (see Ishizuka [0036]). Regarding claim 6, Ishizuka teaches the resin may have a molecular weight of 20,000 to 200,000 (e.g., [0054]). Regarding claim 7, Ishizuka teaches the resin may have a glass transition temperature of from 100 to 160C ([0065]). Regarding claim 8, Ishizuka teaches the resin may have a refractive index of from 1.635 to 1.695 at 589 nm ([0057]). Regarding claim 15, modified Ishizuka additionally teaches that the groups corresponding to Ar1 and Ar2 may be substituted aryl groups having 6 to 12 carbons (see Lee, [0046]), the groups corresponding to the claimed Z1 and Z2 groups may be alkylene groups having from 1 to 4 carbon atoms (see Ishizuka, [0036]), and the group corresponding to the claimed L’ group need not be included by the language of claim 1 and thus, because Ishizuka teaches a linking group corresponding to the claimed limitation of element L is considered to teach the required elements of claim 15 (see Ishizuka, [0036]). Regarding claim 16, modified Ishizuka additionally teaches that an end group may be, for example, CO2CH3 (see, e.g., [0036]). Regarding claim 17, Ishizuka additionally teaches that the resin may have an Abbe’s number on the range of 24 or less under substantially similar testing conditions to those claimed (Ishizuka, [0058]). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Ashida (US 2015/0158800, “Ashida”) teaches a resin comprising a terphenyl (or diphenylbenzene) type structure (see General Formula (6) and see Ashida, [0009]). Such a structure may read on the claimed Chemical Formula 1. The medial benzyl group of the structure of Ashida may be substituted with two aryl groups at para positions and additionally with two R2 groups at the third and fifth positions and which may be, for example, alkoxy groups ([0009], [0013] – [0018]). Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANTHONY J FROST whose telephone number is (571)270-5618. The examiner can normally be reached on Monday to Friday, 8:00am to 4:00pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Aaron Austin, can be reached on 571-272-8935. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ANTHONY J FROST/Primary Examiner, Art Unit 1782
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Prosecution Timeline

Feb 24, 2023
Application Filed
Feb 05, 2026
Non-Final Rejection — §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
52%
Grant Probability
73%
With Interview (+20.7%)
3y 10m
Median Time to Grant
Low
PTA Risk
Based on 637 resolved cases by this examiner. Grant probability derived from career allow rate.

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