Prosecution Insights
Last updated: July 17, 2026
Application No. 18/564,567

PHOSPHITE COMPOSITION

Non-Final OA §112
Filed
Nov 27, 2023
Priority
May 31, 2021 — JP 2021-091430 +1 more
Examiner
PAK, HANNAH J
Art Unit
Tech Center
Assignee
SUMITOMO CHEMICAL Company, Limited
OA Round
1 (Non-Final)
78%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allowance Rate
943 granted / 1207 resolved
+18.1% vs TC avg
Strong +20% interview lift
Without
With
+20.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
36 currently pending
Career history
1227
Total Applications
across all art units

Statute-Specific Performance

§103
72.6%
+32.6% vs TC avg
§102
9.8%
-30.2% vs TC avg
§112
8.1%
-31.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1207 resolved cases

Office Action

§112
DETAILED 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 . Specification-Abstract of Disclosure 2. The abstract of the disclosure is objected to for the following reason: The applicants are advised to delete the claimed phrase “represented by formula (1):” The applicants are also advised to delete the claimed phrase “includes a structure represented by formula (2):,” and replace with the deleted phrase the term “has”. Moreover, the applicants are advised to delete the structures (1) and (2) after the claimed phrase “has a content of the oligomer A of 1% or more”. A corrected abstract of the disclosure is required and must be presented on a separate sheet, apart from any other text. See MPEP § 608.01(b). Claim Objections 3. Claims 1-3 are objected to because of the following informalities: As to Claim 1: The applicants are advised to replace “formula (1)” and “formula (2)” with “Formula (1)” and “Formula (2)”, respectively, As to Claim 2: The applicants are advised to replace “formula (3)” with “Formula (3)”. As to Claim 3: The applicants are advised to replace “formula (4)” with “Formula (4)”. Appropriate corrections are 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. 4. Claim 8 is 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. As to Claim 8: While claim 8 refers to claim 6, claim 6 does not mention any presence of “a stabilizer composition”. Thus, it is not clear what “The stabilizer composition” recited in claim 8 is referring to, whether it is referring to the phosphite composition or the stabilizer in claim 6. Clarification in the next response will be helpful to better ascertaining the scope of this claim. Accordingly, the scope of this claim is deemed indefinite. Allowable Subject Matter 5. Claims 1-7 and 9-10 are allowable over the prior art references, namely, English Translation of CN 102718796 (hereinafter referred to as “CN ‘796”) and Kimura et al. (US 7,683,112). 6. None of these cited references individually or in combination teach or would have suggested the claimed phosphite composition comprising a phosphite compound A0 represented by formula (1), and a particular amount of an oligomer derived from the compound A0 represented by formula (2) and has a particular number average molecular weight. Specifically, CN ‘796 discloses a phosphite antioxidant (Paragraph [0007]), comprising as a main component of hydrogenated cashew phenol defined by Formulas III and IV (Paragraphs [0012] and [0020]-[0025]), corresponding to the claimed phosphite compound A0 represented by Formula (1). However, CN ‘796 does not mention a particular amount of an oligomer derived from the compound A0 represented by Formula (2) and has a particular number average molecular weight as required by the claims of the present application. Kimura et al. do not remedy the deficiencies of CN ‘796. Kimura et al. only disclose a phosphite composition comprising 100 parts by weight of a phosphite represented by the formula (1) (see, for example, abstract). However, this phosphite represented by formula (1) taught by Kimura et al. do not correspond to the claimed phosphite compound A0 represented by Formula (1). They, like CN ‘796, also do not mention a particular amount of an oligomer derived from the compound A0 represented by Formula (2) and has a particular number average molecular weight as required by the claims of the present application. Moreover, upon further search, co-pending US Application nos. 19/117,234 (corresponding to US PG PUB 2026/0103482) and 18/842,096 (corresponding to US PG PUB 2025/0171476) were uncovered. However, the claims of these co-pending applications do not recite or would have suggested the presently claimed phosphite composition comprising a phosphite compound A0 represented by formula (1), and a particular amount of an oligomer derived from the compound A0 represented by formula (2) and has a particular number average molecular weight. Accordingly, claims 1-7 and 9-10 are deemed allowable over the prior art reference of record. Correspondence 7. Any inquiry concerning this communication or earlier communications from the examiner should be directed to HANNAH J PAK whose telephone number is (571)270-5456. The examiner can normally be reached 8-5 PM; M-F. 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, Arrie Lanee Reuther, can be reached at (571)-270-7026. 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. /HANNAH J PAK/Primary Examiner, Art Unit 1764
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Prosecution Timeline

Nov 27, 2023
Application Filed
Jun 09, 2026
Non-Final Rejection mailed — §112 (current)

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
78%
Grant Probability
99%
With Interview (+20.5%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1207 resolved cases by this examiner. Grant probability derived from career allowance rate.

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