US5288552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous polytetrafluoroethylene fibers
Assignee: W.L. Gore and Associates Inc
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Filing: 1993-01-08
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Granted: 1994-02-22
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Expires: 2013-01-08
Abstract
Abstract This invention provides for a continuous PTFE fiber having on its surface a substantially round profile and a single spiralling seam formed from a continuous sheet of polytetrafluoroethylene which is helically rolled and self-adhered. The PTFE sheet may include microporous PTFE as well as expanded microporous PTFE. The PTFE sheet may be filled with particulate fillers or coated with polymeric coatings prior to the formation of the inventive fiber. The PTFE sheet may be used to contain various filamentary or sheet-like elements with the inventive fiber. The method for producing the inventive fiber is also disclosed.
Inventors
- 👤 Donald L. Hollenbaugh, Jr.
- 👤 Gordon L. McGregor
- 👤 Raymond B. Minor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/583; B29C53/585; B29C55/00; B29C55/005; B31; B31F; B31F1/00; B31F1/0003; B31F1/0045; B31F1/0048; B31F1/0074; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/12; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29L; B29L2031/00; B29L2031/26; B29L2031/265; Y; Y10; Y10S; Y10S57/00; Y10S57/903; Y10S57/907; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2925; Y10T428/2933; Y10T428/2936; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A continuous fiber comprising a helically rolled self-adhered continuous sheet of expanded porous polytetrafluoroethylene, said fiber having an outside surface with a substantially round profile and a single spiralling seam, and said continuous sheet having a coating of a polymeric material thereon.
Claim 2
Dependent Claim
42 words
A continuous fiber comprising a helically rolled self-adhered continuous sheet of expanded porous polytetrafluoroethylene, said fiber having an outside surface with a substantially round profile and a single spiralling seam, and said continuous sheet having a coating of a polymeric material thereon.
Claim 3
Dependent Claim
17 words
A continuous fiber of claim 1 wherein the coating of a polymeric material is a continuous layer.
Claim 4
Dependent Claim
17 words
A continuous fiber of claim 1 wherein the coating of a polymeric material is a discrete pattern.
Claim 5
Dependent Claim
15 words
A continuous fiber of claim 3 wherein the discrete pattern is a series of dots.
Claim 6
Dependent Claim
15 words
A continuous fiber of claim 3 wherein the discrete pattern is a series of stripes.
Claim 7
Dependent Claim
27 words
A continuous fiber of claim 1 wherein the polymeric material is an elastomeric polymer selected from the group consisting of natural rubber, synthetic rubber, polyurethane and fluoroelastomers.
Claim 8
Dependent Claim
28 words
A continuous fiber of claim 1 wherein the polymeric material is an ion exchange resin selected from the group consisting of perfluorosulfonic acid polymer and perfluorocarboxylic acid polymer.
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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) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |