US3573996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicide coatings for refractory metals
Assignee: National Aeronautics and Space Administration
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Filing: 1968-08-08
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Granted: 1971-04-06
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Expires: 1988-08-08
Abstract
Abstract A SILICIDE COATING PROCESS IN WHICH A MODIFIER ALLOY IS SLURRY APPLIED AND VACUUM SINTERED ONTO A SUBSTRATE PREPARATORY TO SILICIDING.
Inventors
- 👤 Ray T Wimber
- 👤 Alvin R Stetson
- 👤 Arthur G Metcalfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
C; C23; C23C; C23C26/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12681; Y10T428/12771; Y10T428/12861
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |