Prosecution Insights
Last updated: April 19, 2026
Application No. 18/171,860

BASE MEMBER, SPINDLE MOTOR INCLUDING BASE MEMBER, HARD DISK DRIVE DEVICE, AND METHOD FOR MANUFACTURING BASE MEMBER

Final Rejection §102§103§112
Filed
Feb 21, 2023
Examiner
CAZAN, LIVIUS RADU
Art Unit
3729
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Minebea Mitsumi Inc.
OA Round
2 (Final)
62%
Grant Probability
Moderate
3-4
OA Rounds
3y 7m
To Grant
88%
With Interview

Examiner Intelligence

Grants 62% of resolved cases
62%
Career Allow Rate
587 granted / 940 resolved
-7.6% vs TC avg
Strong +25% interview lift
Without
With
+25.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
48 currently pending
Career history
988
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
42.7%
+2.7% vs TC avg
§102
28.0%
-12.0% vs TC avg
§112
23.7%
-16.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 940 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 § 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. Claim(s) 1, 4-6, 10 and 11 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Oh (US2015/0092299A1). Oh discloses the claimed invention as follows (refer to the annotated figure below, corresponding to Fig. 2): PNG media_image1.png 623 469 media_image1.png Greyscale PNG media_image2.png 623 469 media_image2.png Greyscale Claim 1. A base member (110), comprising: a projection (114) having a cylindrical shape and projecting in an axial direction; and a component placement part (P), wherein the projection and the component placement part are adjacent to each other via a curved surface part having a first curved surface (from A to B) and a second curved surface (from B to C), the first curved surface and the second curved surface have a diameter increasing toward the component placement part in the axial direction (see Fig. 2), the second curved surface is located closer to a side of the component placement part than the first curved surface in the axial direction (see Fig. 2), and the first curved surface is continuous with the second curved surface in the axial direction and in a radial direction. Claim 4. The base member according to claim 1, wherein the first curved surface and the second curved surface have a position in the axial direction approaching an upper end part of the projection as the first curved surface and the second curved surface approach the projection in the radial direction. See Fig. 2. Claim 5. The base member according to claim 1, wherein a boundary (B) between the first curved surface and the second curved surface does not project outward from a substantially truncated cone shape (partially identified by the dashed line shown above) surrounded by a boundary between the projection and the first curved surface and a boundary between the second curved surface and the component placement part. Claim 6. The base member according to claim 1, wherein the first curved surface and the second curved surface have a substantially arc-like cross-sectional shape (see Fig. 2) and are formed in an annular shape surrounding the projection. See Fig. 1, showing the cross-section through a larger portion of the spindle moor 100. It is clear the surfaces first and second curved surfaces are annular, formed in and surrounding cylindrical projection 114. Claim 10. A spindle motor (100, Fig. 1) comprising the base member (110) according to claim 1. Claim 11. A hard disk drive device (see claim 17 of Oh) comprising the spindle motor according to claim 10. 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(s) 9 and 12 are rejected under 35 U.S.C. 103 as being unpatentable over Oh in view of Yoshikawa (US2020/0211587A1). Oh discloses the claimed invention, except for the limitations of claims 9 and 12. Yoshikawa shows it is known to fill the housing of a disk drive with helium (see [0022]), and for a housing (casing) height to be for example 42 mm, i.e. 1.65 inches (see [0095]). Therefore, one of ordinary skill in the art before the effective filing date of the claimed invention would have found it obvious to manufacture a disk drive with a housing height in the claimed range, and with a gas such as helium sealed within the housing, as these features are conventional in the disk drive art. Claim(s) 2 and 3 is/are rejected under 35 U.S.C. 103 as being unpatentable over Fujinawa (US2014/0026397A1). Yoshikawa discloses the claimed invention, except for the limitations of claims 2 and 3. Machining the base member using an end mill to obtain smooth finished surfaces is conventional. Fujinawa, for example, discloses utilizing a tool to form smooth surfaces 901 and 902 (collectively: 90), the tool being an end mill, as one example (see [0051]). In view of the teachings of Fujinawa, one of ordinary skill in the art before the effective filing date of the claimed invention would have found it obvious to utilize and end mill to machine the component placement surface of Oh to provide a smooth finish. Inherently, end mils produce cutting marks forming arcs centered on the cutting tool axis, as the tool is moved to machine the surface. Regarding claim 3, since the component placement surface and the second surface are contiguous, the cutting marks would extend to some extent into the flat portion of the second surface. Allowable Subject Matter Claims 7 and 8 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. 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 LIVIUS R CAZAN whose telephone number is (571)272-8032. The examiner can normally be reached Monday - Friday noon-8:30 pm ET. 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, Thomas Hong can be reached at 571-272-0993. 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. /LIVIUS R. CAZAN/Primary Examiner, Art Unit 3729
Read full office action

Prosecution Timeline

Feb 21, 2023
Application Filed
Oct 18, 2025
Non-Final Rejection — §102, §103, §112
Jan 20, 2026
Response Filed
Feb 26, 2026
Final Rejection — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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METHOD FOR MANUFACTURING A 3D ELECTROMECHANICAL COMPONENT HAVING AT LEAST ONE EMBEDDED ELECTRICAL CONDUCTOR
2y 5m to grant Granted Jan 20, 2026
Patent 12506458
PACKAGING MODULE AND PACKAGING METHOD OF BAW RESONATOR
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Method for Embedding a Component in a Printed Circuit Board
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Patent 12500494
METHOD FOR HARDENING A BRIDGE ASSEMBLY OF A ROTATIONAL BODY
2y 5m to grant Granted Dec 16, 2025
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
62%
Grant Probability
88%
With Interview (+25.4%)
3y 7m
Median Time to Grant
Moderate
PTA Risk
Based on 940 resolved cases by this examiner. Grant probability derived from career allow rate.

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