Prosecution Insights
Last updated: May 29, 2026
Application No. 18/373,305

Overhead hoist transfer

Non-Final OA §103
Filed
Sep 27, 2023
Priority
Nov 01, 2022 — TW 111211925
Examiner
KUHFUSS, ZACHARY L
Art Unit
3615
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Chang Jung-Chieh
OA Round
1 (Non-Final)
78%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allowance Rate
837 granted / 1073 resolved
+26.0% vs TC avg
Strong +18% interview lift
Without
With
+17.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
27 currently pending
Career history
1107
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
83.5%
+43.5% vs TC avg
§102
8.4%
-31.6% vs TC avg
§112
2.6%
-37.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1073 resolved cases

Office Action

§103
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 . In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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) 1 is/are rejected under 35 U.S.C. 103 as being unpatentable over Otsuka (US 2022/0081219 A1) in view of Mitschke (US 2022/0395418 A1). Referring to Claim 1: Otsuka teaches an overhead hoist transfer, comprising: a rail assembly (41) including a straight rail (40a) having an empty section, and a curved rail (40b) having a curved empty section (Para. [0020]) (Figs. 3-5); an engine (M1) including a first travel unit (10) having a first wheel (11) and a second wheel (11) at two sides respectively; and a second travel unit (10) having a third wheel (11) and a fourth wheel (11) at two sides respectively (Fig. 1); a moving carriage (1) driven by the engine and suspended from the rail assembly (Para. [0019]); first and second guide wheels (12) disposed on the first travel unit; third and fourth guide wheels (12) disposed on the second travel unit; and two guide boards (42) disposed above a joining point of the straight rail and the curved rail, an elevation of the guide boards being equal to that of the guide wheels, and each of the guide boards including a straight edge and a curved edge (Para. [0020]) (Figs. 4 and 5). Otsuka does not specifically teach an “LSD” or limited slip differential. However, Mitschke teaches an overhead transport system, wherein “FIG. 15 shows a differential drive mechanism 140 that powers shuttle 100 moving along track 120, in accordance with one embodiment of the present invention. A person skilled in the art understands that the components of differential drive mechanism 140 may present an open, locked differential, limited slip differential, or any type that provides safe movement along the support track.” (Para. [0088]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention, for Otsuka to provide the travel unit with a limited slip differential drive mechanism, as taught by Mitschke, in order to provide safe movement along the track with a reasonable expectation of success. Conclusion The references made of record and not relied upon are considered pertinent to applicant's disclosure because the references teach overhead transport guides: US-20210316968-A1, US-20210316967-A1, US-20220041189-A1, US-20230234813-A1, US-11970373-B2, US-12084093-B2, and US-11964851-B2. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ZACHARY L KUHFUSS whose telephone number is (571)270-7858. The examiner can normally be reached Monday - Friday 10:00am to 6:00 pm CDT. 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, Samuel (Joe) Morano can be reached on (571)272-6682. 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. /ZACHARY L KUHFUSS/Primary Examiner, Art Unit 3615A
Read full office action

Prosecution Timeline

Sep 27, 2023
Application Filed
Mar 02, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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ADAPTIVE RAILWAY FASTENER AND ANCHOR INSTALLATION SYSTEM
4y 3m to grant Granted May 26, 2026
Patent 12637117
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Patent 12630239
TRACK DISASSEMBLING DEVICE
2y 8m to grant Granted May 19, 2026
Patent 12606388
SWITCH-ON UNIT IN A LINEAR TRANSPORT SYSTEM
3y 6m to grant Granted Apr 21, 2026
Patent 12600390
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3y 9m to grant Granted Apr 14, 2026
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
96%
With Interview (+17.9%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1073 resolved cases by this examiner. Grant probability derived from career allowance rate.

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