Prosecution Insights
Last updated: October 02, 2026
Application No. 18/666,635

OXIDATION RESISTANCE OF LUBRICANT WITH MODIFIED EPOXIDE-BASED LINKAGES

Final Rejection §112
Filed
May 16, 2024
Examiner
CHAU, LISA N
Art Unit
1785
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Western Digital Technologies Inc.
OA Round
2 (Final)
25%
Grant Probability
At Risk
3-4
OA Rounds
1y 12m
Est. Remaining
43%
With Interview

Examiner Intelligence

Grants only 25% of cases
25%
Career Allowance Rate
129 granted / 511 resolved
-39.8% vs TC avg
Strong +18% interview lift
Without
With
+17.5%
Interview Lift
resolved cases with interview
Typical timeline
4y 4m
Avg Prosecution
51 currently pending
Career history
570
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
57.2%
+17.2% vs TC avg
§102
11.7%
-28.3% vs TC avg
§112
24.2%
-15.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 511 resolved cases

Office Action

§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 . Response to Amendment Examiner acknowledges amended Claims 1 and 3, withdrawn Claims 8-18, withdrawn currently amended Claim 19, canceled Claim 20, and new Claim 21 in the response filed on 6/4/2026. 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 1-7 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. Claims 1 and 2 recite R1, R2, R3, and R4, R5, and R6 independently comprise single or branched non-fluorinated or fluorinated C1-C10 alkyl, C1-C10 alkoxy, benzene, naphthalene, anthracene, phenanthrene, dibenz[a,h]anthracene, pyrene or benzopyrene. According to Applicant’s lubricant formulas, R2 and R3 are directly bonded to each other and are within the lubricant structures. It is unclear to the Examiner how R2 and R3 are bonded to each other and having the claimed structures. For example, if R2 and R3 comprise an alkyl group, such as a methyl group, how can two alkyl/methyl groups be bonded to each other and be part/within a larger chemical structure (i.e. – CH3-CH3 – )? An alkyl group is a carbon chain fragment with one open bond where it attaches to something else (i.e. an alkane missing one hydrogen atom). If it is bonded on both ends, it is no longer considered an alkyl/methyl group. Further clarification and/or correction are required in the next response. Please note that the Examiner did not necessarily limit to the C1-C10 alkyl group. The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 21 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 21 further reciting that R1, R2, R3, or R4 is aromatic, which does not necessarily further limit Claim 1. It appears that Applicant is requiring R1, R2, R3, and/or R4 independently be benzene, naphthalene, anthracene, phenanthrene, dibenz[a,h]anthracene, pyrene or benzopyrene, all of which are aromatic. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Allowable Subject Matter Claims 1-7 and 21 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) and 35 U.S.C 112(d) set forth in this Office action and reflect the election restriction requirement of Group I, Specie: General Formula (Id) in the reply filed on 11/5/2025. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to LISA CHAU whose telephone number is (571)270-5496. The examiner can normally be reached Monday-Friday 11 AM-730 PM. 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. /LC/ Lisa Chau Art Unit 1785 /Holly Rickman/Primary Examiner, Art Unit 1785
Read full office action

Prosecution Timeline

May 16, 2024
Application Filed
Mar 09, 2026
Non-Final Rejection mailed — §112
May 11, 2026
Interview Requested
May 14, 2026
Applicant Interview (Telephonic)
May 17, 2026
Examiner Interview Summary
Jun 04, 2026
Response Filed
Aug 20, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12722997
GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE OR FOR GLASS SPACER TO BE USED IN MAGNETIC RECORDING/REPRODUCING DEVICE, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER TO BE USED IN MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE
3y 0m to grant Granted Sep 01, 2026
Patent 12694900
A MAGNETIC LAYER OF A MAGNETIC RECORDING DISK, AND RELATED MAGNETIC RECORDING DISKS
4y 5m to grant Granted Jul 28, 2026
Patent 12694895
Film and Method for BiSbX (012) Texture for SOT Devices
2y 12m to grant Granted Jul 28, 2026
Patent 12651610
FLUORINE-CONTAINING ETHER COMPOUND, LUBRICANT FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
2y 5m to grant Granted Jun 09, 2026
Patent 12555601
MAGNETIC RECORDING DISK WITH HIGH INTERNAL STRESS TO REDUCE DISK DEFLECTIONS FROM SHOCK FORCES AND METHODS FOR USE WITH THE DISK
4y 4m to grant Granted Feb 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
25%
Grant Probability
43%
With Interview (+17.5%)
4y 4m (~1y 12m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 511 resolved cases by this examiner. Grant probability derived from career allowance rate.

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