US3690977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making air-permeable waterproof products having fabric-like aesthetic properties
Assignee: Celanese Corp
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Filing: 1970-06-04
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Granted: 1972-09-12
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Expires: 1990-06-04
Abstract
Abstract NOVEL PRODUCTS ARE DESCRIBED WHICH POSSES A CAPABILITY OF TRANSMITTING AIR AND MOISTURE VAPOR, ARE WATERPROFF, AND HAVE FABRIC-LIKE AESTHETIC PROPERTIES. THESE PRODUCTS MAY HAVE APPLICATIONS SUCH AS RAINWEAR MATEIAL, TENT MATERIAL, GARMENT LINERS, AND SHOE LINERS. THESE PRODUCTS MAY BE MADE BY SPRAY SPINNING FILAMENTARY POLYMER MATERIAL ONTO OPEN-CELLED POLYMER FILM, OR INTO NON-CELLULAR ELASTIC POLYMER FILM WITH THE ADDITIONAL STEPS OF STRETCHING AND HEAT SETTING CREATING A STABLE OPEN-CELLED STRUCTURE IN THE FILM PORTION OF THE PRODUCT. SUBSEQUENT CALENDERING OF THE PRODUCT MAY FURTHER IMPROVE ITS FABRIC-LIKE AESTHETIC PROPERTIES.
Inventors
- 👤 John T Loft
- 👤 Steven G Plovan
- 👤 Clifford M Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0088; D04; D04H; D04H13/00; D04H3/00; D04H3/08; D04H3/16; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0012; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29K; B29K2105/00; B29K2105/04; B29K2995/00; B29K2995/0037; B29K2995/0072; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |