Patent JPS6423731A successfully refreshed from Google Patents.
US4529645A
Expired / Lapsed
US
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Polyethylene-terephthalate-backed adhesive tape or extreme dimensional stability
Assignee: 3M Co
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Filing: 1982-10-19
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Granted: 1985-07-16
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Expires: 2002-10-19
Abstract
Abstract Adhesive tape useful in supporting an array of parallel optical fibers in an optical transmission cable comprising an adhesive-covered biaxially oriented polyethylene terephthalate film having defined ranges for the proportion of gauche and trans conformations of the ethylene glycol linkages of the polyethylene terephthalate molecule, as measured by infrared spectroscopy, whereby extreme dimensional stability is achieved.
Inventors
- 👤 James G. Berg
- 👤 Ta-Sheng Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/25; C09J7/255; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4403; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249944; Y10T428/26; Y10T428/266; Y10T428/28; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
Multifiber ribbon useful in optical transmission cables comprising a plurality of parallel polymer-coated optical fibers laminated between two adhesive-covered biaxially oriented polyethylene terephthalate films, which are less than about 50 micrometers in thickness and exhibit gauche and trans parameters as described herein of between about 0.6 and 0.725 for the gauche parameter and about 3.1 or greater for the trans parameter; the adhesive-covered films shrinking on average less than about 0.2 percent in length upon exposure in an unstressed condition for two hours at 100° C. and less than about 2 percent in length upon exposure in an unstressed condition for one hour at 175° C.
Claim 2
Dependent Claim
106 words
Multifiber ribbon useful in optical transmission cables comprising a plurality of parallel polymer-coated optical fibers laminated between two adhesive-covered biaxially oriented polyethylene terephthalate films, which are less than about 50 micrometers in thickness and exhibit gauche and trans parameters as described herein of between about 0.6 and 0.725 for the gauche parameter and about 3.1 or greater for the trans parameter; the adhesive-covered films shrinking on average less than about 0.2 percent in length upon exposure in an unstressed condition for two hours at 100° C. and less than about 2 percent in length upon exposure in an unstressed condition for one hour at 175° C.
Claim 3
Dependent Claim
18 words
Multifiber ribbon of claim 1 in which the film exhibits a gauche parameter of about 0.625 or greater.
Claim 4
Dependent Claim
14 words
Multifiber ribbon of claim 1 in which the film is about 25 micrometers thick.
Claim 5
Dependent Claim
24 words
Multifiber ribbon of claim 1 in which the film is about 25 micrometers thick and exhibits a gauche parameter of about 0.625 or greater.
Claim 6
Dependent Claim
16 words
Multifiber ribbon of claim 1 in which the adhesive covering the film comprises a pressure-sensitive adhesive.
Claim 7
Dependent Claim
13 words
Multifiber ribbon of claim 5 in which the adhesive comprises an acrylate-based copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |