Prosecution Insights
Last updated: October 01, 2026
Application No. 19/061,154

TWIST-LOCK FASTENERS, ASSEMBLIES, AND METHODS FOR FASTENING

Non-Final OA §102§112
Filed
Feb 24, 2025
Priority
May 24, 2024 — provisional 63/651,468
Examiner
HOTCHKISS, MICHAEL WAYNE
Art Unit
3726
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
The Boeing Company
OA Round
3 (Non-Final)
70%
Grant Probability
Favorable
3-4
OA Rounds
11m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allowance Rate
267 granted / 384 resolved
-0.5% vs TC avg
Strong +50% interview lift
Without
With
+49.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
51 currently pending
Career history
434
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
49.3%
+9.3% vs TC avg
§102
25.9%
-14.1% vs TC avg
§112
23.6%
-16.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 384 resolved cases

Office Action

§102 §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. Claim 4 is 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 4 recites “the base” there is insufficient antecedent basis for this limitation. Claim Rejections - 35 USC § 102 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 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 and 10 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Okada (US20110116890A1). Claim 1 A twist-lock fastener comprising: an anchor (30) configured for attaching to a first article (Figure 7A) and comprising: a body (Figure 2A) having a semi-cylindrical shape (Figure 2A shows the body of the anchor includes (“having”) a semi cylindrical shape at the upper region.) and forming a cavity (Figure 2A, cavity extending through in the top of the body), wherein the body comprises a first arc end and a second arc end spaced away from the first arc end to form an opening (Figure 2A shows the notches (31b, 31c) separate the opening into two spaced arcs that each have ends.) in the body such that the body flexes in response to a radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (Figures 2A-2B show the body has portions that are forced inward to reduce the cross sectional dimension of the body when force is applied.); a first anchor tab (33) extending radially outward from the body proximate the first arc end (Figure 2A shows the anchor tabs (33) are each closer to one set of arc ends than the other.); a second anchor tab (33) extending radially outward from the body proximate the second arc end (Figure 2A shows the anchor tabs (33) are each closer to one set of arc ends than the other.); and a lip extending radially outward from the body (Figure 2A shows the anchor has a lip at the end of the tabs (33).) opposite the opening (The lip extends away from the opening.); and a retainer (10) comprising: a locking portion (19) configured for inserting in the cavity and selectively locking to the body (Figure 8A); and a holding portion (11) extending from the locking portion and configured for holding a second article. (Figure 8B shows the holding portion (11) holds articles (2, 4, 50).) Claim 3 Okada teaches the twist-lock fastener of Claim 1, wherein: (Figure 3C, opening in the top of the body); and the locking portion of the retainer comprises a base (15) configured for inserting in the opening in a first angular orientation and engaging the body in a second angular orientation. (Figures 6 and 8A show the angular orientation of the body (in particular the portions (40)) and the base (15) changes between the insertion and engagement steps.) Claim 10 Okada teaches the twist-lock fastener of Claim 1, wherein the anchor further comprises at least one of: first teeth extending from at least a portion of the first anchor tab(Figure 2A shows teeth (36) extending from each anchor tab (33) region.); and second teeth extending from at least a portion of the second anchor tab. (Figure 2A shows teeth (36) extending from each anchor tab (33) region.) Claims 1-4 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Leverger (EP-3482089-B1). Claim 1 Leverger teaches a twist-lock fastener comprising: an anchor (16) configured for attaching to a first article (Figure 1) and comprising: a body (16) having a semi-cylindrical shape (Figure 5) and forming a cavity (Figure 5), wherein the body comprises a first arc end (ends of the rim of the receptacle (24)) and a second arc end (ends of the rim of the receptacle (24)) spaced away from the first arc end to form an opening (Figure 5) in the body such that the body flexes in response to a radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (The fastener of Leverger is capable of performing this intended use based on the structure.); a first anchor tab (Figure 5 shows protruding portions on each side of the top face (22b) that are “anchor tab”s.) extending radially outward from the body proximate the first arc end; a second anchor tab (Figure 5 shows protruding portions on each side of the top face (22b) that are “anchor tab”s.) extending radially outward from the body proximate the second arc end; and a lip extending radially outward from the body opposite the opening (Figure 5 shows a protruding portion extending from the top surface (22b) opposite the opening.); and a retainer (18) comprising: a locking portion (54) configured for inserting in the cavity and selectively locking to the body (Figure 8A-8C); and a holding portion (46) extending from the locking portion and configured for holding a second article. (¶0029 teaches the indentation (46) is for holding a tool.) Claim 2 Leverger teaches the twist-lock fastener of Claim 1, wherein, with the locking portion of the retainer inserted in the cavity of the body of the anchor, the retainer is configured for rotating relative to the anchor between an unlocked position and a locked position. (Figures 11-13, ¶0049) Claim 3 Leverger teaches the twist-lock fastener of Claim 1, wherein: the locking portion (54) of the retainer comprises a base (56) configured for inserting in the opening in a first angular orientation and engaging the body in a second angular orientation. (Figures 8a-8c or ¶0040) Claim 4 Leverger teaches the twist-lock fastener of Claim 1, wherein the body of the anchor comprises a first slot and a second slot (32); the base of the retainer comprises a first retainer flange and a second retainer flange (42); with the retainer in a first angular orientation, the first retainer flange is receivable by the first slot and the second retainer flange is receivable by the opening (Figure 8a shows a first angular orientation where the first flange (42) is within the first slot and the second (42) is “receivable” into the opening, since it is within the opening.); and with the retainer in a second angular orientation, the first retainer flange is receivable by the first slot and the second retainer flange is receivable by the second slot are configured for mating together. (Figure 8c shows a second angular orientation where the first and second flanges (42) are within the slots (32).) Claims 1, 4-5, 18-19 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Zhang (US 20070253794A1). Claim 1 Zhang teaches a twist-lock fastener (Figure 1) comprising: an anchor (20) configured for attaching to a first article (Figure 3) and comprising: a body (20) having a semi-cylindrical shape (Figure 1) and forming a cavity (26), wherein the body comprises a first arc end and a second arc end spaced away from the first arc end to form an opening in the body (Figure 1 shows at least two two arc ends that are spaced from one another the are part of the opening (top opening of 26).) such that the body flexes in response to a radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (The structure of Zhang meets the claimed spacing of arc ends, so it is capable of performing the claimed intended use.); a first anchor tab (222) extending radially outward from the body proximate the first arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (222) is “proximate” an arc end.); a second anchor tab (222) extending radially outward from the body proximate the second arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (222) is “proximate” an arc end.); and a lip extending radially outward from the body opposite the opening (The bottom surface of the anchor tabs (222) forms a lip that extends radially outward.); and a retainer (40) comprising: a locking portion (44) configured for inserting in the cavity (Figure 3) and selectively locking to the body (Figure 3); and a holding portion (42) extending from the locking portion and configured for holding a second article. (The holding portion (42) is for holding the articles (60, 80) or an external force application member (See ¶0015).) Claim 4 Zhang teaches the twist-lock fastener of Claim 1, wherein the body of the anchor comprises a first slot (24) and a second slot (24); the base of the retainer comprises a first retainer flange and a second retainer flange (442); with the retainer in a first angular orientation, the first retainer flange is receivable by the first slot and the second retainer flange is receivable by the opening (The first angular orientation is where the blocks (442) are inserted into the openings (242) and then the slots (244).); and with the retainer in a second angular orientation, the first retainer flange is receivable by the first slot and the second retainer flange is receivable by the second slot are configured for mating together. (The second angular orientation is when the retainer (40) is rotated to move the blocks (442) further into the slots (244).) Claim 5 Zhang teaches the twist-lock fastener of Claim 4, wherein: the first slot comprises a first end and a second end (Figure 1); the second slot comprises a first end and the second end (Figure 1); the second end of first slot and the second end of second slot are configured for stopping rotation of the retainer at the second angular orientation (Figure 4); and the first end of second slot is configured for receiving the second retainer flange when rotating the retainer relative to the anchor from the first angular orientation to the second angular orientation. (Figures 3-4) Claim 18 Zhang teaches teaches an assembly comprising : a first article (60) comprising a hole (Figure 3); an anchor (20) situated in the hole and coupled to the first article (Figure 3), the anchor comprising: a body having a semi-cylindrical shape (Figure 1) and forming a cavity (26), wherein the body comprises a first arc end and a second arc end spaced away from the first arc end to form an opening in the body (Figure 1 shows at least two two arc ends that are spaced from one another the are part of the opening (top opening of 26).) such that the body flexes in response to radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (The structure of Zhang meets the claimed spacing of arc ends, so it is capable of performing the claimed intended use.); a first anchor tab extending radially outward from the body proximate the first arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (222) is “proximate” an arc end.); a second anchor tab extending radially outward from the body proximate the second arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (222) is “proximate” an arc end.); and a lip extending radially outward from the body opposite the opening (The bottom surface of the anchor tabs (222) forms a lip that extends radially outward.); and a retainer (40) comprising: a locking portion (44) inserted in the cavity and selectively locked to the body (Figure 3); and a holding portion (42) extending from the locking portion; and a second article (60) coupled to the first article by the holding portion. (Figure 3-4) Claim 19 Zhang teaches the assembly of Claim 18, wherein with the locking portion of the retainer inserted in the cavity of the body of the anchor, the retainer is configured for rotating relative to the anchor between an unlocked position and a locked position. (Figures 3-4) Claims 1, 11-12, 18, 21 and 24 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Arisaka (US 20070253794A1). Claim 1 Arisaka teaches a twist-lock fastener (Figure 1) comprising: an anchor (1) configured for attaching to a first article (Figure 8) and comprising: a body having a semi-cylindrical shape (Figure 4) and forming a cavity (interior cavity of the anchor), wherein the body comprises a first arc end and a second arc end spaced away from the first arc end to form an opening (Figure 4) in the body such that the body flexes in response to a radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (Arisaka teaches the structural requirements (arc ends and a gap) and therefore teaches the claimed intended use of said structure.); a first anchor tab extending radially outward from the body proximate the first arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (6) is “proximate” an arc end.); a second anchor tab extending radially outward from the body proximate the second arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (6) is “proximate” an arc end.); and a lip extending radially outward from the body opposite the opening (Figure 1 shows a lip (bottom of 6) extends in a direction opposite the opening.); and a retainer (3) comprising: a locking portion (12) configured for inserting in the cavity and selectively locking to the body (Figure 10); and a holding portion (10) extending from the locking portion and configured for holding a second article. (Figure 10) Claim 11 Arisaka teaches the twist-lock fastener of Claim 1, wherein: the anchor further comprises a receiver (8) extending inwardly from the body into the cavity (Figure 7); and with the locking portion of the retainer inserted in the cavity of the anchor, the locking portion engages the receiver. (Figure 10) Claim 12 Arisaka teaches the twist-lock fastener of Claim 1, wherein the holding portion comprises a clip. (¶0027 teaches the fastener is a clip. The holding portion (10) is part of this clip.) Claim 18 Arisaka teaches an assembly comprising : a first article (P1) comprising a hole (Figure 7); an anchor (1) situated in the hole and coupled to the first article (Figure 7), the anchor comprising: a body having a semi-cylindrical shape (Figure 4) and forming a cavity (interior cavity of the anchor), wherein the body comprises a first arc end and a second arc end spaced away from the first arc end to form an opening in the body (Figure 4) such that the body flexes in response to radially inward force to reduce a chord dimension of the anchor and expands upon removal of the force (Arisaka teaches the structural requirements (arc ends and a gap) and therefore teaches the claimed intended use of said structure.); a first anchor tab extending radially outward from the body proximate the first arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (6) is “proximate” an arc end.); a second anchor tab extending radially outward from the body proximate the second arc end (The term “proximate” is a term of degree not currently defined in the claim. Each anchor tab (6) is “proximate” an arc end.); and a lip extending radially outward from the body opposite the opening (Figure 1 shows a lip (bottom of 6) extends in a direction opposite the opening.); and a retainer (3) comprising: a locking portion (12) inserted in the cavity and selectively locked to the body (Figure 10); and a holding portion (10) extending from the locking portion; and a second article (P2) coupled to the first article by the holding portion. (Figure 7) Claim 21 Arisaka teaches the assembly of Claim 18, wherein the holding portion comprises one of a clip, an eyelet, a magnet, a cable holder, or a threaded insert. (¶0027 teaches the fastener is a clip. The holding portion (10) is part of this clip.) Claim 24 Arisaka teaches the assembly of Claim 18, wherein the anchor further comprises at least one of: first teeth extending from at least a portion of the first anchor tab; and second teeth extending from at least a portion of the second anchor tab. (Figure 1 shows teeth (8) extending from a region of each anchor tab (6).) Allowable Subject Matter Claims 13-17, 20 and 22-23 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including 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: The most relevant prior art found during the search and consideration period for the application does not teach, or in combination, obviate the limitations of Claims 13-17, 20 and 22-23. The prior art does not teach the limitations regarding the receiver/retainer interaction in Claims 17, 21 or 23 and while the prior art does provide teachings of clips in use with fasteners or assemblies as recited in Claims 1 or 18, there was no teaching found of the other alternatives for the holding portion in combination with the features of amended Claims 1 or 18. Response to Arguments Applicant's arguments filed 05/22/2026 with respect to the rejections using Okada have been fully considered but they are not persuasive. Applicant argues that Okada does not tech the new amendments to Claim 1. A new rejection is presented above to indicate the portions of Okada that are relevant to applicant’s amendments to Claim 1. Applicant’s arguments, see remarks, filed 05/22/2026, with respect to the rejection(s) of claim 1 under 35 USC 102 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of Leverger, Zhang or Arisaka as presented above. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure can be found on the PTO-892 Form. US5387065A – Figure 1 teaches an anchor (12) and a retainer (10) where the anchor has a cylindrical shape (20) with openings (30) and arc ends. The retainer fits into the anchor (Figure 2). 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 Michael W Hotchkiss whose telephone number is (571)272-3854. The examiner can normally be reached Monday-Friday from 0800-1600. 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, Sunil K Singh can be reached at 571-272-3460. 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. /MICHAEL W HOTCHKISS/Primary Examiner, Art Unit 3726
Read full office action

Prosecution Timeline

Show 8 earlier events
May 07, 2026
Interview Requested
May 15, 2026
Applicant Interview (Telephonic)
May 15, 2026
Examiner Interview Summary
May 22, 2026
Response after Non-Final Action
Jun 03, 2026
Request for Continued Examination
Jun 12, 2026
Response after Non-Final Action
Jul 07, 2026
Examiner Interview (Telephonic)
Jul 14, 2026
Non-Final Rejection mailed — §102, §112 (current)

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Prosecution Projections

3-4
Expected OA Rounds
70%
Grant Probability
99%
With Interview (+49.6%)
2y 6m (~11m remaining)
Median Time to Grant
High
PTA Risk
Based on 384 resolved cases by this examiner. Grant probability derived from career allowance rate.

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