Prosecution Insights
Last updated: October 23, 2026
Application No. 18/639,048

POLYCARBONATE RESIN COMPOSITION

Non-Final OA §102§103§112
Filed
Apr 18, 2024
Priority
Oct 28, 2021 — JP 2021-176673 +1 more
Examiner
SERGENT, RABON A
Art Unit
1765
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Mitsubishi Chemical Corporation
OA Round
1 (Non-Final)
55%
Grant Probability
Moderate
1-2
OA Rounds
1y 0m
Est. Remaining
79%
With Interview

Examiner Intelligence

Grants 55% of resolved cases
55%
Career Allowance Rate
556 granted / 1009 resolved
-9.9% vs TC avg
Strong +24% interview lift
Without
With
+24.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
37 currently pending
Career history
1058
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
35.3%
-4.7% vs TC avg
§102
15.4%
-24.6% vs TC avg
§112
37.5%
-2.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1009 resolved cases

Office Action

§102 §103 §112
Detailed Office Action Notice of Pre-AIA or AIA Status 1. The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Indefiniteness Rejection 2. 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. 3. Claims 1-14 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. With respect to claim 1, within the definitions of the R variables, the two occurrences of “may” render the claims indefinite, because the language denoted by “may” is not definitive. It is unclear if or to what extent the language denoted by “may” is optional. Prio Art Rejection 4. 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. 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. 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. 5. Claims 1-11 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by JP H06248066 A. JP H06248066 A discloses within Example 2 (see paragraphs [0062] and [0063] within the English translation) a polycarbonate copolymer produced by reacting 61 g (0.27 mol) of 2,2-bis(4-hydroxyphenyl)propane, corresponding to applicants’ formula (3), 15 g (0.06 mol) of 2,2-bis(3-methyl-4-hydroxyphenyl)propane, corresponding to applicants’ formulas (1) and (4), and 12 g (0.06 mol) of 4,4'-dihydroxybiphenyl, corresponding to applicants’ formula (2). The molar ratio of 4,4'-dihydroxybiphenyl to 2,2-bis(3-methyl-4-hydroxyphenyl)propane is 1. The content of 4,4'-dihydroxybiphenyl derived units in the copolymer is about 15 mol%; the content of 2,2-bis(3-methyl-4-hydroxyphenyl)propane derived units in the copolymer is about 15 mol%, and the content of 2,2-bis(4-hydroxyphenyl)propane derived units in the copolymer is about 69 mol%. Regarding claim 6, since the resulting polycarbonate composition constitutes mixtures of various polycarbonate polymers having the claimed structures but varying in such properties as individual chain molecular weight, to the extent claimed, the composition constitutes a blend of polymers and the claim is met. Regarding claims 7-9, since the copolymer is produced from the same diol reactants in the same amounts as claimed, the resulting properties are inherently possessed by the polycarbonate. . 6. Claims 12-14 are rejected under 35 U.S.C. 103 as being unpatentable over JP H06248066 A in view of Ohira et al. (US 2022/0049092 A1) . JP H06248066 A discloses within Example 2 (see paragraphs [0062] and [0063] within the English translation) a polycarbonate copolymer produced by reacting 61 g (0.27 mol) of 2,2-bis(4-hydroxyphenyl)propane, corresponding to applicants’ formula (3), 15 g (0.06 mol) of 2,2-bis(3-methyl-4-hydroxyphenyl)propane, corresponding to applicants’ formulas (1) and (4), and 12 g (0.06 mol) of 4,4'-dihydroxybiphenyl, corresponding to applicants’ formula (2). The molar ratio of 4,4'-dihydroxybiphenyl to 2,2-bis(3-methyl-4-hydroxyphenyl)propane is 1. The content of 4,4'-dihydroxybiphenyl derived units in the copolymer is about 15 mol%; the content of 2,2-bis(3-methyl-4-hydroxyphenyl)propane derived units in the copolymer is about 15 mol%, and the content of 2,2-bis(4-hydroxyphenyl)propane derived units in the copolymer is about 69 mol%. 7. Though the primary reference discloses the production of films, the reference fails to disclose injection or extrusion molded products; however, the use of injection or extrusion molding to process polycarbonate polymer was known at the time of invention as evidenced by Ohira et al. within paragraph [0122]. Accordingly, the position is taken that utilizing such processing methods to produce products from the polycarbonate of the primary reference would have been obvious. Conclusion 8. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Rabon A Sergent whose telephone number is (571)272-1079. The examiner can normally be reached on Monday through Friday from 9:00 AM until 5:00 PM, ET. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Heidi Riviere Kelley, can be reached at telephone number 571-270-1831. 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 Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center to authorized users only. Should you have questions about access to the USPTO patent electronic filing system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via a variety of formats. See MPEP § 713.01. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) Form at https://www.uspto.gov/InterviewPractice. /RABON A SERGENT/Primary Examiner, Art Unit 1765
Read full office action

Prosecution Timeline

Apr 18, 2024
Application Filed
Oct 01, 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
55%
Grant Probability
79%
With Interview (+24.1%)
3y 7m (~1y 0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1009 resolved cases by this examiner. Grant probability derived from career allowance rate.

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