Patent US3677879A successfully refreshed from Google Patents.
US3677879A
Expired / Lapsed
US
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Thermally conductive bearing material
Assignee: United States Department of the Army
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Filing: 1970-04-28
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Granted: 1972-07-18
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Expires: 1990-04-28
Abstract
Abstract A LIGHT WEIGHT COMPOSITE MATERIAL CONSISTING ESSENTIALLY OF GEOMETRICALLY IDENTICAL METAL FIBERS UNIFORMLY DISTRIBUTED IN A RANDOMLY ORIENTED FASHION THROUGHTOUT A MATRIX OF AN EPOXY RESIN MIXED WITH AN AMINE CURING AGENT HAS BEEN FOUND TO BE PARTICULARLY USEFUL AS A MATERIAL FOR BEARINGS WITH LARGE SURFACE AREAS IN FRICTIONAL CONTACT WITH STEEL SURFACES. THE MATERIAL CAN BE TAILORED TO PROVIDE A PREDETEMINED THERMAL CONDUCTIVITY WITH ISOTROPIC OR ANISOTROPIC CHARACTERISTICS BY THE PROPER CONTROL OF SUCH FACTORS AS THE THERMAL CONDUCTIVITY OF THE MATRIX, THE RATION OF FIBER VOLUME TO THAT OF THE MATRIX, AND THE GEOMETRY OF THE INDIVIDUAL FIBERS.
Inventors
- 👤 Giuliano D Andrea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:09
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16C2208/00; F16C2208/80; F16C2208/86
Claims Analysis
Total Claims: 0
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |