Prosecution Insights
Last updated: July 17, 2026
Application No. 17/988,470

ELEVATOR SAFETY SYSTEM

Non-Final OA §103
Filed
Nov 16, 2022
Priority
Sep 30, 2022 — EU 22382909.4
Examiner
DHAKAL, BICKEY
Art Unit
2896
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Otis Elevator Company
OA Round
2 (Non-Final)
84%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allowance Rate
636 granted / 756 resolved
+16.1% vs TC avg
Strong +16% interview lift
Without
With
+16.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
25 currently pending
Career history
778
Total Applications
across all art units

Statute-Specific Performance

§101
2.5%
-37.5% vs TC avg
§103
69.2%
+29.2% vs TC avg
§102
8.8%
-31.2% vs TC avg
§112
18.0%
-22.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 756 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 . Applicant's submission filed on 04/01/2026 has been entered. Claims 1-13 and 15 are still pending. Claim Rejections - 35 USC § 103 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. 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. Claims 1-3 and 6-13 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Monzon et al. US 2011/0094832 A1 (IDS supplied prior art) in a view of Leone et al. US 5,025,895. Regarding claim 1, Monzon et al. disclose An elevator system (Fig. 2b), comprising: at least one refuge space (top of the car); and at least one light curtain (items 10 and 12) [0022]; wherein the at least one light curtain is configured to: detect at least one object in the at least one refuge space [0007, 0021, 0022]; and produce at least one safety signal (via emitters) indicating the presence of the at least one object in the at least one refuge space [0022] (claims 1 and 2 on page 2); Monzon does not disclose but Leone et al. disclose wherein the elevator system (fig. 3, item 30) is configured to produce the at least one safety signal (intrusion) only when the at least one object has been consistently detected for a predetermined period of time (column 1, lines 60-68, column 3, lines 1-67, column 4, lines 1-26). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify Monzon’s elevator system to include functionality of detecting for a predetermined period of time as taught by Leone in order to avoid false warning of any entry onto an elevator cab roof (Leone’s column 1, lines 50-57) Regarding claim 2, Monzon et al. disclose wherein the at least one refuge space comprises a refuge space on the top of the elevator car; and/or wherein the at least one refuge space comprises a refuge space in the elevator pit [0022]. Regarding claim 3, Monzon et al. disclose , wherein the elevator system comprises an elevator car (item 2) [0018] having a crosshead; and wherein the at least one light curtain comprises a light curtain positioned on the crosshead (fig. 2 shows a crosshead with a light curtain). Regarding claim 6, Monzon et al. disclose , wherein the at least one light curtain is arranged to project its curtain substantially horizontally [0021]. Regarding claim 7, Monzon et al. disclose , wherein the at least one light curtain comprises a first light curtain (item 10) and a second light curtain (item 12) [0021]. Regarding claim 8, Monzon et al. disclose , wherein the first light curtain and the second light curtain are arranged to point in different directions (different angles); and/or wherein the first light curtain and the second light curtain are arranged at different heights [0021]. Regarding claim 9, Monzon et al. disclose , wherein the first light curtain and the second light curtain are arranged to overlap above at least a portion of the bottom of the refuge space (fig. 2b shows items 10 and 12 each covers a portion of the bottom while viewing from the top). Regarding claim 10, Monzon et al. disclose , wherein the elevator system further comprises an elevator controller [0002], configured to receive the at least one safety signal from the at least one light curtain; wherein, upon receiving the at least one safety signal from the at least one light curtain), the elevator controller is configured to implement a safety response [0021, 0022]. Regarding claim 11, Monzon et al. disclose , wherein the safety response comprises one or more of: an emergency stop; moving an elevator car at a reduced speed (the brake will be applied); operating the elevator system in a pre-inspection operational mode; operating the elevator system in an inspection mode; illuminating the at least one refuge space; and sending a signal to a communications center or a building manager [0021, 0022]. Regarding claim 12, Monzon et al. disclose , wherein the elevator controller is configured to operate the elevator system in a post-inspection mode when the at least one safety signal is no longer received [0020]. Regarding claim 13, Monzon et al. disclose , wherein the elevator system further comprises a safety chain (Infrared beam) configured to receive the at least one safety signal from the at least one light curtain); wherein, upon receiving the at least one safety signal from the at least one light curtain, the safety chain is broken [0022]. Regarding claim 15, a combination of Monzon and Leone disclose A method of detecting objects in an elevator system comprising: detecting, by at least one light curtain, at least one object in at least one refuge space of the elevator system; producing, from the at least one light curtain, at least one safety signal indicating the presence of the at least one object in the at least one refuge space; ;wherein producing the at least one safety signal comprises producing the at least one safety signal only when the at least one object has been consistently detected for a predetermined period of time (see claim 1 rejection for details). Regarding claim 4, a combination of Monzon and Leone does not disclose wherein the at least one light curtain is located at least 20 cm above the bottom of the refuge space, optionally at least 30 cm above the bottom of the refuge space, optionally at least 40 cm above the bottom of the refuge space. However, Monzon’s fig. 2b shows the light curtain at a certain distance above the bottom of the car. Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to locate the light curtain at least 30 cm above the bottom to achieve passenger safety. Regarding claim 5, Monzon does not disclose, wherein the at least one light curtain has a curtain width of at least 20 cm, optionally at least 40 cm, optionally at least 60 cm. However, fig. 2b shows the light curtain at a certain width. Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have at least 20 cm of a curtain width to get a reliable obstruction detection. Response to Arguments Applicant’s arguments with respect to claims 1 and 15 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BICKEY DHAKAL whose telephone number is (571)272-3577. The examiner can normally be reached 8:30-4:30 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, Eduardo Santana can be reached on 571-272-2060. 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. /BICKEY DHAKAL/Primary Examiner, Art Unit 2837
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Prosecution Timeline

Nov 16, 2022
Application Filed
Jan 06, 2026
Non-Final Rejection mailed — §103
Apr 01, 2026
Response Filed
May 14, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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ELEVATOR DOOR CONTROL DEVICE
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5y 7m to grant Granted Jun 16, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
84%
Grant Probability
99%
With Interview (+16.5%)
2y 4m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 756 resolved cases by this examiner. Grant probability derived from career allowance rate.

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