Prosecution Insights
Last updated: April 19, 2026
Application No. 18/509,295

ELECTROMECHANICAL BRAKE SYSTEM HAVING MULTIPLE SCREW-NUT MECHANISMS

Non-Final OA §102§112
Filed
Nov 14, 2023
Examiner
DANG, TINH
Art Unit
3655
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
HL Mando Corporation
OA Round
1 (Non-Final)
85%
Grant Probability
Favorable
1-2
OA Rounds
1y 11m
To Grant
93%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allow Rate
454 granted / 534 resolved
+33.0% vs TC avg
Moderate +8% lift
Without
With
+7.7%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 11m
Avg Prosecution
18 currently pending
Career history
552
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
28.2%
-11.8% vs TC avg
§102
35.7%
-4.3% vs TC avg
§112
32.7%
-7.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 534 resolved cases

Office Action

§102 §112
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 CORRESPONDENCE This is the first Office action on the merits for Application No. 18/590,295, filed 11/14/2023. Claims 1-17 are pending. Information Disclosure Statement The information disclosure statement (IDS) received on 11/14/2023 has been considered by the examiner. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. Claims 1-17 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor, or for pre-AIA the applicant regards as the invention. Claim 1 recites the limitations "the first gear” and “the second gear" in lines 7 and 11. There are insufficient antecedent basis for these limitations in the claim. Claim 6 recites the limitations "diameters of the first gear of the rotatable body of the first screw-nut mechanism and the second gear of the rotatable body of the second screw-nut mechanism" in lines 1-3. It is unclear whether the limitation is referring to the diameters of the first gear of the first screw nut mechanism and the second gear of the second screw-nut mechanism or the diameters of both first/second gears and the rotatable bodies of the first/second screw-nut mechanisms. For the purposes of examination, the limitation is interpreted as - -diameters of the first gear of Claims 2-17 are rejected up dependent from a rejected base claim and they inherit its deficiencies. 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1-3, 6-8 and 17 are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Gerber et al. (US 2023/0012601 A1). Regarding claim 1, Gerber discloses an electromechanical brake system (figs. 14-22) comprising: a pair of screw-nut mechanisms (figs. 15, 16) comprising first and second screw-nut mechanisms (i.e., includes at least ramp nuts 460 and spindles 192), each screw-nut mechanism comprising a rotatable body (460) configured to be rotatable and a translatable body (192) operably coupled with the rotatable body, the translatable body configured to be axially translatable relative to the rotatable body to move a brake pad assembly (37) according to rotation of the rotatable body, wherein the rotatable body of the first screw-nut mechanism is provided with the first gear (fig. 20, i.e., driven gear 580) and the rotatable body of the second screw-nut mechanism is provided with the second gear (i.e., the other gear 580 of driven gears 580); an actuator assembly (paragraphs [0098 – 0099], [0105], i.e., includes motor assembly 600) configured to provide a torque; and a drive gear (560) rotatably engaged between the first gear (580) of the rotatable body of the first screw-nut mechanism and the second gear (i.e., the other gear of driven gears 580) of the rotatable body of the second screw-nut mechanism and operably connected to the actuator assembly to be rotated by the torque of the actuator (paragraphs [0095 – 0105]. Regarding claim 2, Gerber discloses the electromechanical brake system of claim 1, wherein the drive gear (560) is configured to rotate both the first gear (driven gear 580) of the rotatable body of the first screw-nut mechanism and the second gear (i.e., the other gear of driven gears 580) of the rotatable body of the second screw-nut mechanism simultaneously by the torque of the actuator to rotate the rotatable body of the first screw-nut mechanism and the rotatable body of the second screw-nut mechanism simultaneously (paragraphs [0095 – 0105]. Regarding claim 3, Gerber discloses the electromechanical brake system of claim 1, wherein the translatable body of the first screw-nut mechanism and the translatable body of the second screw-nut mechanism are operably coupled to the brake pad assembly (37) so that the translatable body of the first screw-nut mechanism and the translatable body of the second screw-nut mechanism simultaneously move the brake pad assembly (37) according to the rotation of the rotatable body of the first screw-nut mechanism and the rotatable body of the second screw-nut mechanism to apply or release brake (see paragraphs [0098] – [0100], [0113] and [0076]. Regarding claim 6, as best understood, Gerber discloses the electromechanical brake system of claim 1, wherein diameters of the first gear (i.e., diameter of driven gear 580) of the rotatable body of the first screw-nut mechanism and the second gear (i.e., diameter of the other gear of the driven gears 580) of the rotatable body of the second screw-nut mechanism are larger than a diameter of the drive gear (560) rotatably engaged between the first gear and the second gear (i.e., drive gears 580). Regarding claim 7, Gerber discloses the electromechanical brake system of claim 1, wherein: the rotatable body (460) and the translatable body (192) of the first screw-nut mechanism and the rotatable body (i.e., the other rotatable body of ramp nuts 460) and the translatable body of the second screw-nut mechanism have threaded grooves (fig. 15), and a threaded direction (fig. 18) of the threaded grooves of the rotatable body and the translatable body of the first screw-nut mechanism and a threaded direction of the threaded grooves of the rotatable body and the translatable body of the second screw-nut mechanism are same as each other (shown in figures 15, 16 and 18). Regarding claim 8, Gerber discloses the electromechanical brake system of claim 1, wherein the drive gear (560), the first gear (i.e., driven gear 580) of the rotatable body of the first screw-nut mechanism and the second gear (i.e., the other gear of driven gears 580) of the rotatable body of the second screw-nut mechanism are arranged on a same plane as each other (shown in fig. 20). Regarding claim 17, Gerber discloses the electromechanical brake system of claim 1, wherein: a diameter of the first gear (fig. 20, i.e., diameter of driven gear 580) of the first screw-nut drive mechanism is larger than an outer diameter of the rotatable body (480) of the first screw-nut drive mechanism, and a diameter of the second gear (fig. 20, i.e., diameter of the other gear of driven gears 580) of the second screw-nut drive mechanism is larger than an outer diameter of the rotatable body of the second screw-nut drive mechanism (shown in figure 15). Claims 1, 4-5 and 16 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Shou et al. (CN 104389927 A, machine translation attached). Regarding claim 1, Shou discloses an electromechanical brake system (figs. 1-3 and machine translation attached) includes a pair of screw-nut mechanisms (figs. 1 and 2, i.e., each screw nut mechanism includes members 12,13), first and second screw-nut mechanisms (12,13), each screw-nut mechanism having a rotatable body (i.e., screw nut 13) configured to be rotatable and a translatable body (i.e., screw 12) operably coupled with the rotatable body (13), the translatable body (12) configured to be axially translatable relative to the rotatable body to move a brake pad assembly (7-9) according to rotation of the rotatable body, wherein the rotatable body (13) of the first screw-nut mechanism is provided with the first gear (i.e., output gear 5) and the rotatable body (i.e., the other ball screw of the ball screws 12) of the second screw-nut mechanism is provided with the second gear (i.e., the other gear of the output gears 5); an actuator assembly (i.e., includes motor 19) configured to provide a torque; and a drive gear (3) rotatably engaged between the first gear (5, i.e., via idle gear 4) of the rotatable body of the first screw-nut mechanism and the second gear (fig. 3, i.e., the other gear 5; via gear 4) of the rotatable body of the second screw-nut mechanism and operably connected to the actuator assembly (19) to be rotated by the torque of the actuator (par. [0031], [0038]). Regarding claim 4, Shou discloses the electromechanical brake system of claim 1, wherein: the first gear (5) is fixed to the rotatable body (i.e., screw nut 13; fig. 2) of the first screw-nut mechanism, and the second gear (i.e., the other gear of output gears 5) is fixed to the rotatable body (i.e., the other ball screw nut of ball screw nuts 13) of the second screw-nut mechanism (figs. 1 and 2). Regarding claim 5, Shou discloses the electromechanical brake system of claim 1, wherein: teeth of the first gear (fig. 2, i.e., teeth of output gear 5) are directly formed on the rotatable body (13) of the first screw-nut mechanism, and teeth of the second gear (i.e., teeth of the other gear of output gears 5) are directly formed on the rotatable body (i.e., the other ball screw nut of ball screw nuts 13) of the second screw-nut mechanism. Regarding claim 16, Shou discloses the electromechanical brake system of claim 1, wherein: the rotatable body (13) of the first screw-nut mechanism has an inner race of a first bearing (fig. 2, i.e., inner race of bearing 15) rotatably supporting the rotatable body of the first screw-nut mechanism and the first gear (5) rotatably engaged with the drive gear (3, i.e., via gear 4), and the rotatable body (i.e., the other ball screw nut 13) of the second screw-nut mechanism has an inner race of a second bearing (i.e., the other inner race of the other bearing of bearings 15) rotatably supporting the rotatable body of the second screw-nut mechanism and the second gear rotatably engaged with the drive gear (i.e., drive gear 3 is indirectly rotatably engaged with the other output gear of output gears 5). Allowable Subject Matter Claims 9-15 are rejected but 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. The following is a statement of reasons for the indication of allowable subject matter: Regarding claim 9, the prior art of record fails to disclose or render obvious the electromechanical brake system of claim 1 and in combination with the features recited. Claims 10-15 are allowable as being dependent upon the allowable base claim. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Tinh T Dang whose telephone number is (571)270-1776. The examiner can normally be reached Monday - Friday, 9AM - 5PM. 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, Ernesto Suarez can be reached at Mon-Friday from 8AM-4:30PM at (571) 270-5565. 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. /TINH T DANG/Primary Examiner, Art Unit 3655
Read full office action

Prosecution Timeline

Nov 14, 2023
Application Filed
Feb 05, 2026
Non-Final Rejection — §102, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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2y 5m to grant Granted Jan 27, 2026
Patent 12534080
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Patent 12528349
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2y 5m to grant Granted Jan 20, 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
85%
Grant Probability
93%
With Interview (+7.7%)
1y 11m
Median Time to Grant
Low
PTA Risk
Based on 534 resolved cases by this examiner. Grant probability derived from career allow rate.

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