US3823029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating graphite filaments with refractory metal carbides
Assignee: United States Atomic Energy Commission
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Filing: 1972-08-01
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Granted: 1974-07-09
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Expires: 1992-08-01
Abstract
Abstract FINE GRAPHITE FILAMENTS FOR USE AS REINFORCEMENTS IN METALS AND ALLOYS ARE COATED WITH A THIN LAYER OF A REFRACTORY METAL CARBIDE BY HEATING THE FILAMENTS IN A LOWMELTING METAL CONTAINING A SMALL AMOUNT OF A REFRACTORY METAL.
Inventors
- 👤 M Rashid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:34
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/126; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |