US4565727B1
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US
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US4565727B1 - - Google Patents
Assignee: Wyeth Holdings LLC
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Filing: 1985-04-23
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Granted: 1989-01-24
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Expires: 2005-04-23
Abstract
Abstract An air and water vapor permeable, toxic vapor absorptive non-woven fabric material comprising a wet-laid sheet containing fibrillated acrylic fiber, and an activated carbon constituent selected from the group consisting of activated carbon fiber and activated carbon particles.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:58
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/12; D21H13/16; A; A62; A62D; A62D5/00; D21H13/18; D21H13/36; D21H13/46; D21H13/50; D21H17/00; D21H17/63; D21H17/67; D21H5/00; D21H5/12; A61; A61F; A61F13/00; A61F13/15; A61F2013/15008; A61F2013/15048; A61F2013/15065; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/218; Y10T442/2189; Y10T442/2508; Y10T442/2516; Y10T442/50; Y10T442/57; Y10T442/60; Y10T442/693; Y10T442/697
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |