Patent JPS5921799A successfully refreshed from Google Patents.
US3556836A
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Composite boron filaments with matrix overcoat
Assignee: RTX Corp
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Filing: 1967-02-24
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Granted: 1971-01-19
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Expires: 1987-02-24
Abstract
Abstract A BORON FILAMENT HAVING A THIN, PROTECTIVE LAYER OF SILICON CARBIDE IS FURTHER PROVIDED WITH AN OVERCOAT OF A MATRIX MATERIAL INCLUDING PARTICULARLY THE LIGHT METALS SUCH AS ALUMINUM, MAGNESIUM, TITANIUM AND THE ALLOYS THEREOF, TO THEREBY PROVIDE A FILAMENT WHICH IS NOT ONLY CHARACTERIZED BY HIGH STRENGTH BUT ALSO BY IMPROVED UTILITY IN THE PRODUCTION OF FIBER-REINFORCED ARTICLES.
Inventors
- 👤 Malcolm Basche
- 👤 Roy Fanti
- 👤 Salvatore F Galasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:28
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; C22; C22C; C22C49/00; C23C28/00; C23C28/30; C23C28/32; C23C28/321; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2958; Y10T428/2964
Claims Analysis
Total Claims: 0
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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) | 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 |