US3493415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a diffusion bonded refractory coating
Assignee: National Aeronautics and Space Administration
•
Filing: 1967-11-16
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Granted: 1970-02-03
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 Salvatore J Grisaffe
- 👤 William A Spitzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:28
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/06; C23C4/08; C23C4/02; C23C4/10
Claims Analysis
Total Claims: 0
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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) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |