Patent US4557673A successfully refreshed from Google Patents.
US3676293A
Expired / Lapsed
US
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Laminated article
Assignee: Monsanto Co
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Filing: 1970-04-22
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Granted: 1972-07-11
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Expires: 1990-04-22
Abstract
Abstract A SHAPED LAMINATED OBJECT OF REINFORCED FIBROUS SILICON CARBIDE COMPRISES A LAYER OF A SKELETAL STRUCTURE OF FIBROUS SILICON CARBIDE WHICH CRYSTALIZES IN THE CUBIC CRYSTALLINE FORM AS FIBERS WHICH HAVE A LENGTH TO DIAMETER RATIO OF AT LEAST 5, THE SAID FIBROUS SILICON CARBIDE LAYER BEING INTIMATELY BONDED WITH AT LEAST ONE LAYER OF CARBON. SUCH OBJECTS ARE CHARACTERIZED BY EXTREME STRENGTH AND HIGH TEMPERATURE STABILITY AND MAY BE USEFUL AS NOSE CONES OF MISSILES AND ROCKETS.
Inventors
- 👤 Bernard A Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:05
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B32; B32B; B32B9/00; B32B9/005; B32B9/007; B32B9/04; B32B9/047; C01B32/963; C01B32/97; C04; C04B; C04B14/00; C04B14/38; C04B14/46; C04B14/4687; C04B14/4693; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C22; C22C; C22C49/00; C30; C30B; C30B25/00; C30B25/005; C30B29/00; C30B29/10; C30B29/36; B32B2262/00; B32B2262/10; B32B2262/106; C01P; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/10; C01P2004/60; C01P2004/61; C01P2004/62; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/298; Y10T428/30
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |