Prosecution Insights
Last updated: July 17, 2026
Application No. 18/544,679

FIBER OPTIC CONNECTORS WITH SEALING MEMBERS AND METHODS OF FABRICATING THE SAME

Non-Final OA §102§103
Filed
Dec 19, 2023
Priority
Dec 22, 2022 — provisional 63/434,521
Examiner
HAYES, MARY A
Art Unit
2874
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Corning Incorporated
OA Round
1 (Non-Final)
82%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
92%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
586 granted / 714 resolved
+14.1% vs TC avg
Moderate +10% lift
Without
With
+9.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
12 currently pending
Career history
737
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
80.1%
+40.1% vs TC avg
§102
14.4%
-25.6% vs TC avg
§112
2.3%
-37.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 714 resolved cases

Office Action

§102 §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 . Election/Restrictions Applicant's election with traverse of Invention I, drawn to claims 1-22, in the reply filed on 04/17/2026 is acknowledged. The traversal is on the ground that examination of method claims 23-27 would not be burdensome. This is not found persuasive because the method steps as recited in claims 23-27 have acquired a separate patentability category, namely the method of assembling. As noted in the restriction requirement (mailed 2/20/2026), “[e]ach invention requires a unique and separate search including different search terms and different classification areas.” The requirement is still deemed proper and is therefore made FINAL. 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. Claims 1, 3-5, 12, and 14-16, are rejected under 35 U.S.C. 102(a)(1) as being anticipated by US 5,210,810 A Darden et al. (herein “Darden”, cited on the IDS of 5/09/2024). Darden discloses a fiber optic connector assembly (20) comprising: PNG media_image1.png 580 826 media_image1.png Greyscale a housing (housing 83) comprising a rear end and a front end (see annotated fig. 2) with a longitudinal passageway (dotted line 67) extending from the rear end to the front end, wherein the rear end extends from a wall (see annotated fig. 2); a connector sleeve (annotated fig. 2) comprising a first end, a reduced diameter portion (at rings 132) at the first end, a rear wall (annotated fig. 2), and a second end extending from the rear wall (see bracket), wherein: the first end of the connector sleeve is disposed over the rear end of the housing (83); and the reduced diameter portion of the connector sleeve and the wall of the housing define a primary groove (annotated fig. 2); and a boot (strain relief 30, bend limiter 31, and metallic insert 37) having an insertion end, wherein the boot is disposed over a portion of the second end of the connector sleeve such that the insertion end of the boot and the rear wall of the connector sleeve define a secondary groove (annotated fig. 2). Regarding claim 3, Darden discloses the assembly further comprising a ferrule assembly (80) comprising a ferrule holder (102), a ferrule (“plug 90”) disposed in the ferrule holder, and a ferrule spring (106), wherein the ferrule assembly is disposed within the longitudinal passageway at the front end of the housing. Regarding claim 4, Darden discloses a cable adapter (52) comprising a front end having a fiber opening (where fiber 22 extends through), a strength member enclosure (28), and a rear end comprising two wings (tabs 58), wherein the cable adapter is disposed within the second end of the connector sleeve (shown in annotated Fig. 2). Regarding claim 5, Darden discloses in Fig. 2, an optical cable (24) comprising a jacket (29), one or more strength members (KEVLAR yarn) within the jacket, and an optical fiber (22) within the jacket, wherein: the one or more strength members terminate within the strength member enclosure (28); and the optical fiber extends through the fiber opening (shown in Fig. 2) (col. 3, line 56 – col. 4, line3). Regarding claim 12, Darden discloses a fiber optic connector assembly (20) comprising: a housing (housing 83) comprising a rear end and a front end (see annotated fig. 2) with a longitudinal passageway (dotted line 67) extending from the rear end to the front end, wherein the rear end extends from a wall (see annotated fig. 2); a connector sleeve (annotated fig. 2) comprising a first end, a reduced diameter portion (at rings 132) at the first end, a rear wall (annotated fig. 2), and a second end extending from the rear wall (see bracket), wherein: the first end of the connector sleeve is disposed over the rear end of the housing (83); and the reduced diameter portion of the connector sleeve and the wall of the housing define a primary groove (annotated fig. 2); and the second end of the connector sleeve comprises an engagement groove (the valley or root of the thread is considered engagement groove) a boot (strain relief 30, bend limiter 31, and metallic insert 37) having an insertion end and a barb (crest of the thread) at an interior surface of the insertion end, wherein the boot is disposed over a portion of the second end of the connector sleeve such that the insertion end of the boot and the rear wall of the connector sleeve define a secondary groove (annotated fig. 2) and the barb is disposed within the engagement groove (see engagement of element 48 and 46 in fig. 2). Regarding claim 14, Darden discloses the assembly further comprising a ferrule assembly (80) comprising a ferrule holder (102), a ferrule (“plug 90”) disposed in the ferrule holder, and a ferrule spring (106), wherein the ferrule assembly is disposed within the longitudinal passageway at the front end of the housing. Regarding claim 15, Darden discloses a cable adapter (52) comprising a front end having a fiber opening (where fiber 22 extends through), a strength member enclosure (28), and a rear end comprising two wings (tabs 58), wherein the cable adapter is disposed within the second end of the connector sleeve (shown in annotated Fig. 2). Regarding claim 16, Darden discloses in Fig. 2, an optical cable (24) comprising a jacket (29), one or more strength members (KEVLAR yarn) within the jacket, and an optical fiber (22) within the jacket, wherein: the one or more strength members terminate within the strength member enclosure (28); and the optical fiber extends through the fiber opening (shown in Fig. 2) (col. 3, line 56 – col. 4, line3). 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 2, 9-11, 13, and 20-22 are rejected under 35 U.S.C. 103 as being unpatentable over US 5,210,810 A Darden et al. (herein “Darden”, cited on the IDS of 5/09/2024). Regarding claims 2 and 13, Darden discloses the invention of claim 1 and claim 12, wherein the external body as annotated in fig. 2 above is referenced as coupling nut 150. However, Darden is silent to the material makeup of the coupling nut 150 is metal. However, using metal is well known and has known properties including strength and durability in harsh environments, and the use thereof would have been predictable to one of ordinary skill in the art before the effective filing date of the claimed invention. The benefits of using metal as the coupling nut (“connector sleeve”) include durability in harsh environments. Regarding claims 9, 10, 20, and 21, Darden discloses a primary sealing member (O-ring 132) disposed near the first end of the sleeve and a secondary sealing member (tapered sealing member 33) disposed within the secondary groove (see annotated Fig. 2). Darden is silent as to a sealing member in the primary groove. However, it would have been obvious to one of ordinary skill in the art at the effective filing date of the invention, to use sealing members throughout the connector assembly, anywhere needed, especially where, due to movement, an additional sealing element might be necessary. Darden is already using sealing elements and understands the benefits of providing an adequate seal. Regarding claim 11, Darden discloses the secondary sealing member comprises a straight portion (wedge 35) and a tapered portion (33) extending from an end of the straight portion (see Fig. 2). Regarding claim 22, Darden discloses the secondary sealing member comprises a straight portion (wedge 35) and a tapered portion (33) extending from an end of the straight portion (see Fig. 2). Claim(s) 6-8 and 17-19 is/are rejected under 35 U.S.C. 103 as being unpatentable over US 5,210,810 A Darden et al. (herein “Darden”, cited on the IDS of 5/09/2024) in view of US 2020/0096705 A1 Rosson (herein “Rosson”, cited on the IDS of 5/09/2024). Regarding claims 6 and 17 Darden is silent as to specifically using adhesive to connect the elements. However, Rosson discloses in Figs. 47-49, the housing further comprises a housing adhesive aperture (59A); the cable adapter further comprises an adapter adhesive aperture (59R); the housing adhesive aperture is aligned with the adapter adhesive aperture (shown in Figs. 48 and 48A); and an adhesive is disposed within the housing adhesive aperture, the adapter adhesive aperture, and the strength member enclosure (para [0156]). It would have been obvious to one of ordinary skill at the effective filing date of the invention to use adhesive as taught by Rosson, or any other known securing means, to ensure all of the elements stay in place and are secure. Rosson teaches this allows for a secure and sealed fit. Regarding claims 7 and 18 Rosson discloses in Figs. 47-49, a first adhesive annulus is between an outer surface of the rear end of the housing and an inner surface of the connector sleeve; a second adhesive annulus is between an outer surface of the front end of the cable adapter and an inner surface of the rear end of the housing; and the adhesive is disposed within the first adhesive annulus and the second adhesive annulus (para [0156], wherein “cable adapter 59 comprises passageway 59P from a cable adapter front end 59F to a cable adapter rear end 59R”, thus the annulus extends through and is on both sides). It would have been obvious to one of ordinary skill at the effective filing date of the invention to use adhesive structure as taught by Rosson, or any other known securing means, to ensure all of the elements stay in place and are secure. Rosson teaches this allows for a secure and sealed fit. Regarding claim 8, Darden discloses a boot (strain relief 30, bend limiter 31, and metallic insert 37) having an insertion end and a barb (crest of the thread) at an interior surface of the insertion end, wherein the boot is disposed over a portion of the second end of the connector sleeve such that the insertion end of the boot and the rear wall of the connector sleeve define a secondary groove (annotated fig. 2) and the barb is disposed within the engagement groove (see engagement of element 48 and 46 in fig. 2). Regarding claims 8 and 19, Darden is silent as to, but Rosson discloses in Figs. 4A-E, the second end of the connector sleeve comprises an engagement groove (22); the fiber optic connector assembly further comprises a heat shrink member (99) disposed over the optical cable and a portion of the second end of the connector sleeve up to the engagement groove (para [0015). It would have been obvious to one of ordinary skill at the effective filing date of the invention to use a heat shrink tube as taught by Rosson, or any other known securing means, to ensure all of the elements stay in place and are secure. Rosson teaches this allows for a secure and sealed fit. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARY A EL-SHAMMAA whose telephone number is (571)272-2469. The examiner can normally be reached Mon-Fri, 9am-6pm (flexible schedule). 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, Thomas Hollweg can be reached at 571-270-1739. 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. /MARY A EL-SHAMMAA/ Examiner, Art Unit 2874 /THOMAS A HOLLWEG/Supervisory Patent Examiner, Art Unit 2874
Read full office action

Prosecution Timeline

Dec 19, 2023
Application Filed
Jun 23, 2026
Non-Final Rejection mailed — §102, §103 (current)

Precedent Cases

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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
82%
Grant Probability
92%
With Interview (+9.5%)
2y 6m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 714 resolved cases by this examiner. Grant probability derived from career allowance rate.

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