Prosecution Insights
Last updated: April 19, 2026
Application No. 18/861,341

FLUORINE-CONTAINING ETHER COMPOUND, LUBRICANT FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM

Non-Final OA §102§103§112
Filed
Oct 29, 2024
Examiner
CHAU, LINDA N
Art Unit
1785
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Resonac Corporation
OA Round
1 (Non-Final)
43%
Grant Probability
Moderate
1-2
OA Rounds
4y 0m
To Grant
60%
With Interview

Examiner Intelligence

Grants 43% of resolved cases
43%
Career Allow Rate
241 granted / 558 resolved
-21.8% vs TC avg
Strong +16% interview lift
Without
With
+16.4%
Interview Lift
resolved cases with interview
Typical timeline
4y 0m
Avg Prosecution
54 currently pending
Career history
612
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
53.4%
+13.4% vs TC avg
§102
20.0%
-20.0% vs TC avg
§112
18.6%
-21.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 558 resolved cases

Office Action

§102 §103 §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 . 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 1-12 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. Regarding claim 1, it is not clear what is meant by “partially or entirely the same as or different from each other” means. If the substituents are different from each other, why state that they may be partially the same or different? To clarify what the substituents may be, the claim language would be clearer if Applicant states that the substituents are independently the same or different. Claims 1 and 6-7 recites “x pieces of R3’s” and “(x+1) pieces of R2’s”. It is not clear what is meant by “x pieces” of R3 and “(x+1) pieces” of R2’s. 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. Claims 1-2, 5, and 7-12 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Deng et al. (US 2015/0235664). Regarding claims 1-2, 4-5, 7-8, Deng et al. discloses a lubricant compound for magnetic recording media having the formula: Re-Rz-Ri-Rz-Ri-Rz-Re (see Abstract), wherein Re is X-CH2CH(X)CH2-, thereby the shortest distance of carbon atoms between X or polar groups is 2, Rz is –OCH2CF2O(CF2CF2O)nCF2CH2O-, and Ri is –CH2CH(X)CH2OCH2CH(X)CH2-, wherein X is preferably hydroxyl groups (see claims 1-16, [0092-0094]). Regarding claim 9, given that Deng discloses the lubricant compound as claimed, Deng discloses the MW. Regarding claims 10-11, please see Fig. 14. Regarding claim 12, please see claim 18. 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. Claim 3 is rejected under 35 U.S.C. 103 as being unpatentable over Deng et al. (US 2015/0235664) in view of Sagata (US 2013/0209837). Deng discloses a fluorine-containing ether compound comprising X-CH2CH(X)CH2- as the terminal end group, wherein X is a hydroxyl group as set forth above. However, Deng fails to disclose the terminal end group as presently claimed. Sagata discloses a lubricant for a magnetic recording medium, which is analogous art to that of Deng, wherein the terminal end group is -CH2CH(OH)CH2OH or -CH2(OH)CHCH2-OC6H4-R1, wherein R1 is c1-4 alkoxy, amino, or an amide residue, thereby shows that they are of an equivalent structure known in the art. Therefore, because these two materials were art-recognized equivalents prior to the effective filing date of the claimed invention, one of ordinary skill in the art would have found it obvious to substitute is -CH2CH(OH)CH2OH for -CH2(OH)CHCH2-OC6H4-R1, wherein R1 is c1-4 alkoxy, amino, or an amide residue in the invention of Deng. Substitution of equivalents requires no express motivation as long as the prior art recognizes the equivalency. In re Fount 213 USPQ 532 (CCPA 1982); In re Siebentritt 152 USPQ 618 (CCPA 1967); Grover Tank & Mfg. Co. Inc V. Linde Air Products Co. 85 USPQ 328 (USSC 1950). A preponderance of the evidence supports the Examiner’s conclusion that it would have been obvious to have substituted the structure as claimed with a reasonable expectation of success. Claim 6 is rejected under 35 U.S.C. 103 as being unpatentable over Deng et al. (US 2015/0235664) in view of Sasa et al. (US 2007/0225183). Deng discloses a fluorine-containing ether compound as set forth above, wherein –CH2CH(OH)CH2OCH2CH(OH)CH2 is between two PFPEs. However, Deng fails to explicitly disclose Formula (2-1) as presently claimed. Sasa discloses a lubricant for a magnetic recording medium, which is analogous art to that of Deng, comprising PNG media_image1.png 58 150 media_image1.png Greyscale , wherein Pol is hydroxyl group, between two PFPEs chain (X) [0013-0017]. It is also noted that Sasa discloses that the average molecular weight between two adjacent polar groups is not less than 500 [0017], thereby is open to additional structure between the polar groups. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify Deng’s CH2CH(OH)CH2OCH2CH(OH)CH2 to be of PNG media_image1.png 58 150 media_image1.png Greyscale , wherein Pol is hydroxyl group, as suggested by Sasa, in order to increase the reliability in a wide temperature-range environment without damaging the flying stability [0016]. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LINDA N CHAU whose telephone number is (571)270-5835. The examiner can normally be reached 9AM-5PM EST 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, Mark Ruthkosky can be reached at (571)272-1291. 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. Linda Chau /L.N.C/ Examiner, Art Unit 1785 /Holly Rickman/ Primary Examiner, Art Unit 1785
Read full office action

Prosecution Timeline

Oct 29, 2024
Application Filed
Feb 13, 2026
Non-Final Rejection — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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BATTERY PACK WITH IMPROVED GAS VENTING PATH
2y 5m to grant Granted Mar 24, 2026
Patent 12567533
INDUCTOR WITH PREFORMED TERMINATION AND METHOD AND ASSEMBLY FOR MAKING THE SAME
2y 5m to grant Granted Mar 03, 2026
Patent 12531088
FLUORINE-CONTAINING ETHER COMPOUND, LUBRICANT FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
2y 5m to grant Granted Jan 20, 2026
Patent 12531087
MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE APPARATUS
2y 5m to grant Granted Jan 20, 2026
Patent 12509393
CEMENT PRODUCTION
2y 5m to grant Granted Dec 30, 2025
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
43%
Grant Probability
60%
With Interview (+16.4%)
4y 0m
Median Time to Grant
Low
PTA Risk
Based on 558 resolved cases by this examiner. Grant probability derived from career allow rate.

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