US3788893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated filaments
Assignee: General Electric Co
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Filing: 1972-02-09
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Granted: 1974-01-29
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Expires: 1992-02-09
Abstract
Abstract A TUNGSTEN CARBIDE COATING IS DEPOSITED UPON THE ELECTRICALLY HEATED SURFACE OF A PYROLYTIC CARBON COATED FUSED SILICA OR QUARTZ FIBER AAS IT IS PASSED THROUGH A LIQUID THERMALLY DECOMPOSABLE TUNGSTEN COMPOUND SUCH AS TUNGSTEN HEXACHLORIDE DISSOLVED IN A NON-POLAR ORGANIC SOLVENT SUCH AS BENZENE.
Inventors
- 👤 C Morelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:36
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/20; C; C03; C03C; C03C25/00; C03C25/10; C03C25/42; C03C25/44; C23; C23C; C23C8/00; C23C8/06; C23C8/08; F; F16; F16J; F16J15/00; F16J15/16; F16J15/168; H01B; H01B1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |