US5066683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous waterproof and moisture vapor permeable structures, processes of manufacture and useful articles thereof
Assignee: Donaldson Co Inc
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Filing: 1990-05-01
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Granted: 1991-11-19
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Expires: 2010-05-01
Abstract
Abstract Microporous waterproof and moisture vapor permeable products are described which are formed from a matrix having an internal microstructure which is coated with a hydrophobic material. A process is described including the steps of (1) applying to the surface of the matrix a liquid hydrophobic material, (2) allowing the liquid to penetrate into the microstructure and then (3) drying, vulcanizing or curing the product.
Inventors
- 👤 Joseph E. Dillon
- 👤 Mark E. Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; B; B29; B29C; B29C48/00; B29C48/022; C08F; C08F259/00; C08F259/08; C08J9/365; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L83/00; C08L83/04; D; D03; D03D; D03D15/00; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2027/00; B29K2027/12; B29K2027/18; C08G; C08G77/00; C08G77/04; C08G77/80; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; C08J2427/00; C08J2483/00; Y; Y10; Y10S; Y10S525/00; Y10S525/903
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A microporous film consisting essentially of a matrix of microporous biaxially fibrillated semi-interpenetrating polymer networks of polytetrafluoroethylene and silicone, said matrix having an internal microstructure consisting of nodes interconnected by fibrils, wherein said internal microstructure is coated with a sufficient amount of a hydrophobic material so as to increase resistance to surfactant activity and wherein the hydrophobic material is selected from the group consisting of cured silicone compositions, non-cured silicone compositions and compositions resulting from the curing of a mixture of a curable silicone composition and a non-curable silicone composition.
Claim 2
Dependent Claim
90 words
A microporous film consisting essentially of a matrix of microporous biaxially fibrillated semi-interpenetrating polymer networks of polytetrafluoroethylene and silicone, said matrix having an internal microstructure consisting of nodes interconnected by fibrils, wherein said internal microstructure is coated with a sufficient amount of a hydrophobic material so as to increase resistance to surfactant activity and wherein the hydrophobic material is selected from the group consisting of cured silicone compositions, non-cured silicone compositions and compositions resulting from the curing of a mixture of a curable silicone composition and a non-curable silicone composition.
Claim 3
Dependent Claim
50 words
A microporous film consisting essentially of a matrix of microporous biaxially fibrillated semi-interpenetrating polymer networks of polytetrafluoroethylene and silicone, said matrix having nodes interconnected by fibrils, wherein the internal microstructure is coated with a sufficient amount of a cured silicone composition effective to provide increased optical transparency of the film.
Claim 4
Dependent Claim
50 words
A microporous film consisting essentially of a matrix of microporous biaxially fibrillated semi-interpenetrating polymer networks of polytetrafluoroethylene and silicone, said matrix having nodes interconnected by fibrils, wherein the internal microstructure is coated with a sufficient amount of a cured silicone composition effective to provide increased optical transparency of the film.
References Cited (Backward Citations)
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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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |