Prosecution Insights
Last updated: April 19, 2026
Application No. 18/414,897

BRAKE APPARATUS, WHEEL BODY ASSEMBLY AND ROLLATOR

Non-Final OA §102
Filed
Jan 17, 2024
Examiner
NGUYEN, TAN QUANG
Art Unit
3661
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Zhejiang Yihengyue Medical Technology Co. Ltd.
OA Round
1 (Non-Final)
90%
Grant Probability
Favorable
1-2
OA Rounds
2y 4m
To Grant
98%
With Interview

Examiner Intelligence

Grants 90% — above average
90%
Career Allow Rate
1025 granted / 1132 resolved
+38.5% vs TC avg
Moderate +7% lift
Without
With
+7.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
19 currently pending
Career history
1151
Total Applications
across all art units

Statute-Specific Performance

§101
3.4%
-36.6% vs TC avg
§103
35.4%
-4.6% vs TC avg
§102
43.7%
+3.7% vs TC avg
§112
5.6%
-34.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1132 resolved cases

Office Action

§102
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 . DETAIL ACTION Notice to Applicant(s) This application has been examined. Claims 1-20 are pending. The prior art submitted on January 17, 2024 has been considered. Receipt is acknowledged of papers submitted under 35 U.S.C. § 119, which have been placed of record in the file. 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, 19 and 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Lin (2017/0361649). As per claim 1, Lin discloses a brake apparatus which includes a shaft body (see at least figure 2, item 15; paragraph 0042); a housing, sleeved outside the shaft body and configured coaxially with the shaft body, the housing being rotatable relative to the shaft body (see at least figure 2, item 1; paragraph 0042), a magnetic induction mechanism, arranged in the housing to generate resisting force opposite to a rotation direction of the housing to the housing or generate resisting force opposite to a rotation direction of the shaft body to the shaft body by a magnetic field reaction when the housing rotates relative to the shaft body (see at least the abstract; figures 5, 6, 7, items 13 and 14; paragraphs 0045-0055); and an adjustment mechanism, connected to the magnetic induction mechanism for adjusting a magnitude of the resisting force (see at least figure 2A, item 17, figures 4A, 5A, 8A; paragraphs 0042-0046, 0052). As per claim 19, Lin discloses that the housing is provided in a circular shape for use as a wheel body (see at least figures 1 and 2). As per claim 20, Lin discloses a rollator which includes a main frame and the wheel body assembly is rotatably connected to a bottom of the main frame (see at least figure 1). Claims 2-18 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Claims 1, 19 and 20 are rejected. Claims 2-18 are objected. The following references are cited as being of general interest: Ham et al. (2023/0270617) and Ham et al. (2023/0271448). Any inquiry concerning this communication or earlier communications from the examiner should be directed to TAN QUANG NGUYEN whose telephone number is (571) 272-6966. The examiner can normally be reached on Monday to Thursday from 7:00am to 5:30pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Peter Nolan, can be reached at 570-270-7016. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://portal.uspto.gov/external/portal. Should you have questions about access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). 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. February 25, 2026 /TAN Q NGUYEN/Primary Examiner, Art Unit 3661
Read full office action

Prosecution Timeline

Jan 17, 2024
Application Filed
Feb 25, 2026
Non-Final Rejection — §102 (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
90%
Grant Probability
98%
With Interview (+7.1%)
2y 4m
Median Time to Grant
Low
PTA Risk
Based on 1132 resolved cases by this examiner. Grant probability derived from career allow rate.

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