Prosecution Insights
Last updated: October 04, 2026
Application No. 19/016,063

ELECTROMAGNETICALLY ACTIVATED RISING STEM VALVE

Final Rejection §103
Filed
Jan 10, 2025
Priority
Jan 12, 2023 — provisional 63/438,687 +1 more
Examiner
VENKATESAN, UMASHANKAR
Art Unit
3753
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Magdrive Technologies Inc.
OA Round
2 (Final)
80%
Grant Probability
Favorable
3-4
OA Rounds
5m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
643 granted / 808 resolved
+9.6% vs TC avg
Moderate +14% lift
Without
With
+13.6%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 2m
Avg Prosecution
18 currently pending
Career history
830
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
48.9%
+8.9% vs TC avg
§102
23.9%
-16.1% vs TC avg
§112
21.3%
-18.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 808 resolved cases

Office Action

§103
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 . DETAILED ACTION This is responsive to the amendment filed 5/22/2026. Applicant amended claims 1 – 2, 8 – 10, 15 – 16, cancelled claims 4 – 5, added claims 21 – 22; claims 1 – 3, 6- 22 are pending in this application. Response to Arguments Applicant’s arguments with respect to claim 1 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. 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). 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. Claims 1 – 3, 7 – 12, 14 – 18, 20 – 22 are rejected under 35 U.S.C. 103 as being unpatentable over US Patent to Billet et al. (11,329,531) in view of US Patent Application Publication to Burgess et al. (2016/0138721). Regarding claims 1, 8, and 15, Billet et al. disclose a magnetically activated rising stem valve, comprising: a shaft (11, Fig. 1) including a stopper at a first end, wherein the stopper is configured to block a pipe (25, Fig. 1) when the valve is in a closed position; a hollow cylindrical element (14, Fig. 1), including a bottom carrier surrounding a portion of the shaft; at least one inner permanent magnetic element (13, Fig. 1) surrounding and attached to a top end of the hollow cylindrical element; a valve housing (16, Fig. 1) surrounding the shaft, the hollow cylindrical element, and the at least one inner permanent magnetic element, wherein the valve housing is sealed and defines a pressure vessel of the valve; an outer magnetic cartridge surrounding a section of the valve housing around the at least one inner permanent magnetic element; and an actuator configured to activate one or more electromagnets (10, Fig. 1) in the outer magnetic cartridge; wherein actuation of the one or more electromagnets does not physically rotate the outer magnetic cartridge relative to the valve housing; wherein an exterior surface of the shaft includes threading – inherently since the shaft 11 has to move with respect to fixed nut 14; and wherein an interior surface of the bottom carrier of the hollow cylindrical element includes threading (15, Fig. 1) configured to interact – by means of the fixed nut 14 - with the threading on the exterior surface of the shaft, such that the hollow cylindrical element and the shaft are rotationally coupled rotation of the hollow cylindrical element causes the shaft to move linearly. Billet et al. do not disclose the external threads of the shaft “matingly interact” with the internal threads of the carrier, however Burgess et al. teach a carrier (62, Fig. 10) with permanent magnets (61, Fig. 10), the shaft external threads matingly interacting with the internal threads of the carrier. Therefore, it would have been obvious to the person having ordinary skill in the art at a time prior to the effective filing date of the application to have modified rotary to linear motion mechanism disclosed by Billet et al. with the mechanism taught by Burgess et al. as a simple substitution of one known element for another to obtain predictable results. In the combination of the prior art elements, one of ordinary skill in the art would have reasonably expected the elements to maintain their respective properties or functions. Regarding claims 2, 9 – 10, and 16 in the combination, Burgess et al. the threading on the exterior surface of the shaft and the threading on the interior surface of the bottom carrier are helical threading (Fig. 10). Regarding claims 3, 11 and 17 - 18 in the combination Burgess et al. disclose the valve housing (11, Fig. 10) includes an adapter plate (11a, 11b, Fig. 10) integrally formed configured to attach the valve to the pipe with one or more attachment means. Regarding claims 7, 14, and 20 in the combination the valve taught by Burgess et al. is used in the petrochemical application. Examiner maintains the electromagnetic external actuator disclosed by Billet et al. adapted to the valve taught by Burgess et al. to be used in the petrochemical application as a simple substitution of permanent magnets for electromagnetic actuator. Regarding claim 21, Billet et al. disclose the actuation of the one or more electromagnets is configured to physically rotate the at least one inner permanent magnetic element and the hollow cylindrical element relative to the valve housing. Regarding claim 22, in combination Burgess et al. teach the stopper is keyed such that the shaft and stopper (28, Fig. 10) are configured only for linear motion. Claims 6, 13 and 19 are rejected under 35 U.S.C. 103 as being unpatentable over US Patent to Billet et al. (11,329,531) in view of US Patent Application Publication to Burgess et al. (2016/0138721) and in further view of US Patent to Davis (10,487,959). Billet et al. do not disclose the shaft is part of a preexisting valve system, and the hollow cylindrical element, the valve housing, and the outer magnetic cartridge are retrofit around the shaft. However retrofitting preexisting valves with magnetic cartridge is well known in the art as taught by Davis. Davis teaches retrofitting existing valves with magnetic actuators [para. 82]. Therefore, it would have been obvious to the person having ordinary skill in the art at a time prior to the effective filing date of the application to have modified adapted the magnetic actuation disclosed by Billet et al. to existing valve as per the teaching of Davis as a combination of prior art elements according to known methods to yield predictable results. 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 UMASHANKAR VENKATESAN whose telephone number is (571)270-5602. The examiner can normally be reached Monday - Friday 9:30 AM - 6:00 PM. If attempts to reach the examiner by telephone are unsuccessful, the examiner' s supervisors Craig Schneider can be reached at (571) 272-3607 or Ken Rinehart can be reached at (571) 272-4881. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center for authorized users only. Should you have questions about access to Patent Center, 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) Form at https://www.uspto.gov/patents/uspto-automated- interview-request-air-form. /UMASHANKAR VENKATESAN/ Primary Examiner, Art Unit 3753
Read full office action

Prosecution Timeline

Jan 10, 2025
Application Filed
Feb 25, 2026
Non-Final Rejection mailed — §103
May 15, 2026
Interview Requested
May 22, 2026
Response Filed
May 22, 2026
Applicant Interview (Telephonic)
May 22, 2026
Examiner Interview Summary
Aug 13, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12738447
Vacuum Processing Device
2y 2m to grant Granted Sep 15, 2026
Patent 12736146
A PRESSURE REGULATING VALVE STRUCTURE
1y 11m to grant Granted Sep 15, 2026
Patent 12729708
DEVICE FOR CONNECTING TWO COMPONENTS WITH IMPROVED TENSILE STRENGTH
2y 6m to grant Granted Sep 08, 2026
Patent 12729661
VALVE STRUCTURE
2y 1m to grant Granted Sep 08, 2026
Patent 12729776
A TORQUE LIMITER COUPLING ASSEMBLY FOR VALVE ACTUATORS
1y 9m to grant Granted Sep 08, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
80%
Grant Probability
93%
With Interview (+13.6%)
2y 2m (~5m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 808 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month