US3556922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-resin composite of polyamide and inorganic fibers
Assignee: EIDP Inc
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Filing: 1968-08-27
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Granted: 1971-01-19
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Expires: 1988-08-27
Abstract
Abstract A FIBER-RESIN COMPOSITE IS DISCLOSED CONTAINING CARBOCYCLIC AROMATIC POLYAMIDE FIBERS AND INORGANIC FIBERS. THE INORGANIC FIBERS ARE LOCATED WITHIN THE PORTIONS OF THE COMPOSITE WHICH WILL BE SUBJECTED TO COMPRESSIVE STRESS, E.G., THESE FIBERS ARE LOCATED WITHIN THE COMPOSITE WHERE THEY WILL BE SUBJECTED TO COMPRESSION ALONG THERI AXES WHEN THE COMPOSITE IS LOADED. PARTICULAR FLEXURAL PROPERTIES OF THE COMPOSITE ARE SIGNIFICANTLY IMPROVED COMPARED TO COMPOSITES CONTAINING EITHER THE POLYAMIDE FIBERS OR THE INORGANIC FIBERS.
Inventors
- 👤 James R Green
- 👤 Joseph T Rivers Jr
- 👤 Donald L G Sturgeon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:40
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; C; C08; C08J; C08J5/00; C08J5/04; C08J5/047; C08J5/24; C08J5/247; B29K; B29K2307/00; C08J2363/00; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/249921; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31511; Y10T428/31525
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |