US4565727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven activated carbon fabric
Assignee: Wyeth Holdings LLC
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Filing: 1985-04-23
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Granted: 1986-01-21
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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 web-laid sheet containing fibrillated acrylic fiber, and an activated carbon constituent selected from the group consisting of activated carbon fiber, activated carbon particles, and mixtures of activated carbon fiber and activated carbon particles.
Inventors
- 👤 Robert D. Giglia
- 👤 Edward A. Battistelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:21
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: 5
Claim 1
Independent Claim
78 words
An air and water vapor permeable, toxic vapor absorptive, non-woven fabric material comprising a wet-laid sheet containing fibrillated acrylic fiber, activated carbon fiber and activated carbon particles, wherein the concentration of fibrillated acrylic fiber ranges from about 5-25% by weight based on the total weight of fibers and particles, the concentration of activated carbon fiber ranges from about 10-75% by weight, same basis, and the concentration of activated carbon particles ranges from about 15-80% by weight, same basis.
Claim 2
Dependent Claim
78 words
An air and water vapor permeable, toxic vapor absorptive, non-woven fabric material comprising a wet-laid sheet containing fibrillated acrylic fiber, activated carbon fiber and activated carbon particles, wherein the concentration of fibrillated acrylic fiber ranges from about 5-25% by weight based on the total weight of fibers and particles, the concentration of activated carbon fiber ranges from about 10-75% by weight, same basis, and the concentration of activated carbon particles ranges from about 15-80% by weight, same basis.
Claim 3
Dependent Claim
13 words
The fabric material of claim 1 wherein the fabric material surface is embossed.
Claim 4
Dependent Claim
13 words
The fabric material of claim 2 wherein a backing member is adhered thereto.
Claim 5
Dependent Claim
13 words
The fabric material of claim 1 wherein a backing member is adhered thereto.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |