Prosecution Insights
Last updated: April 19, 2026
Application No. 18/525,722

KIND OF BENDING BOLT TYPE ANTI-LOOSENING NUT

Non-Final OA §102§103§112
Filed
Nov 30, 2023
Examiner
PATEL, VISHAL A
Art Unit
3675
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Xi'An Xiongfeng Energy Saving Technology Co. Ltd.
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
3y 1m
To Grant
81%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allow Rate
483 granted / 820 resolved
+6.9% vs TC avg
Strong +22% interview lift
Without
With
+21.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
47 currently pending
Career history
867
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
36.8%
-3.2% vs TC avg
§102
33.0%
-7.0% vs TC avg
§112
25.7%
-14.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 820 resolved cases

Office Action

§102 §103 §112
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 . 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-5 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1, “a kind of bending bolt type anti-loosening nut”, unclear what applicant means by a kind and bolt type? Is applicant trying to claim a bending bolt that is anti-loosening nut and if so, then claim that. For examining purpose examiner is rejecting claims as best understood. Claim 2, same 112 rejection as claim 1. Claims are rejected as best understood. Claim 2, “a washer”, unclear how a bolt that is anti-loosening nut can have a washer? Applicant may be trying to claim a fastener assembly having multiple elements? Claim 3-5, same 112 rejection as claim 1. Claims are rejected as best understood. 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. Claim(s) 1 and 3-5 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Wu et al (CN104632850A). Claims are rejected as best understood. Wu discloses a bending bolt anti-loosening nut assembly comprises an upper nut and a lower nut (e.g. nuts shown in figure 1-5), the upper nut and the lower nut are stacked on the outside of the bolt (e.g. see bolt shown in figure 6) and used to tightly connect the bolt to the connecting piece (e.g. see pieces shown in figure 5 having bolt holes), the lower nut is arranged close to the connecting piece, and the upper nut is arranged on the outer end surface of the lower nut (e.g. see figure 5), the adjacent end between the upper nut and lower nut is provided with an inclined surface (e.g. figures 1-4), the inclined surface is inclined towards the interior of the upper nut, so that an inclined plane angle with deformation space between the upper nut and lower nut is formed (e.g. see incline angle beta of the bolt in figure 5 that is created by incline angle(s) of the nut(s)). Regarding claim 3: Wherein the inclined plane angle ranges from 5° to 9° (e.g. translation states 1-10 in paragraph 0032). Regarding claim 4: Wherein the initial state of the upper nut and the lower nut is point contact, and the fastening state of the upper nut and the lower nut is surface contact (e.g. this is the case since the surface of the nut is inclined). Regarding claim 5: Wherein the deformation inclination angle of the bolt is consistent with the inclined plane angle (e.g. this is the case as shown in figure 5). 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) 2 is rejected under 35 U.S.C. 103 as being unpatentable over Wu in view of Yang et al (CN2018509932U). Wu discloses the invention as claimed above but fails to disclose a washer is arranged between the lower nut and the connecting piece, and the washer is sleeved on the bolt. Yang discloses a bending bolt anti-loosening nut (e.g. figure 3) having a washer (e.g. 27) that is arranged between a lower nut (e.g. 2) and the connecting piece (e.g. 22 and/or 23), and the washer is sleeved on the bolt (e.g. figure 3 shows this). It would have been obvious to one skilled in the art before the effective filing date of the claimed invention to configure the bending bolt anti-loosening nut assembly of Wu to have a washer as taught by Yang with reasonable expectation of success to provide a spacer and sealing (e.g. see description of 27 in Yang) and precent damage to connecting piece by the bolt (e.g. washer precent contact with connecting piece). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to VISHAL A PATEL whose telephone number is (571)272-7060. The examiner can normally be reached 7:00 am to 4:00pm. 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, Christine Mills can be reached at 571-272-8322. 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. /VISHAL A PATEL/Primary Examiner, Art Unit 3675
Read full office action

Prosecution Timeline

Nov 30, 2023
Application Filed
Feb 24, 2026
Non-Final Rejection — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12601404
Internally clamping rectangular seal
2y 5m to grant Granted Apr 14, 2026
Patent 12590634
Piston Seal Ring Bypass
2y 5m to grant Granted Mar 31, 2026
Patent 12584556
SLIDING MEMBER
2y 5m to grant Granted Mar 24, 2026
Patent 12569962
HIGH PRESSURE LIQUID-JET SEAL ASSEMBLY CARRIAGE
2y 5m to grant Granted Mar 10, 2026
Patent 12560239
SLIDING COMPONENTS
2y 5m to grant Granted Feb 24, 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
59%
Grant Probability
81%
With Interview (+21.7%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 820 resolved cases by this examiner. Grant probability derived from career allow rate.

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