US3644142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective garment against white phosphorus
Assignee: Wyeth Holdings LLC
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Filing: 1968-12-11
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Granted: 1972-02-22
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Expires: 1988-12-11
Abstract
Abstract Protective garment fabric impervious to burning phosphorus is made with fibrillated polytetrafluoroethylene containing an incorporated copper adjuvant which consists of metallic copper or a copper compound, e.g., copper sulfate, cuprous or cupric oxide and the like. The fabric comprises 10 to 95 percent weight of the copper adjuvant. In preferred embodiments the fabric may also include inorganic fibers, e.g. asbestos. Incorporated polytrifluorochloroethylene improves strength of the fabric. Protective garments can be fashioned from the new fabrics.
Inventors
- 👤 Francis Clyde Rauch
- 👤 Michael Albert Murray
- 👤 Richard Vincent O'lenick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
A; A62; A62D; A62D5/00; A41; A41D; A41D31/00; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T442/00; Y10T442/60; Y10T442/696; Y10T442/699
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
Garment fabric defined by claim 1 wherein said copper sulfate constitutes from 10 to 95 percent by weight of the fabric.
Claim 2
Dependent Claim
18 words
Garment fabric defined by claim 1 further comprising fibers of other heat-resistant, fire-retardant material dispersed in said web.
Claim 3
Dependent Claim
14 words
Garment fabric defined by claim 1 further comprising polytrifluorochloroethylene in mixture with said polytetrafluoroethylene.
Claim 4
Dependent Claim
14 words
Garment fabric defined by claim 1 further comprising asbestos fibers dispersed in said web.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |