US3437511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal surfaced with boron and coating of silicon,silicon carbide or titanium nitride
Assignee: United States Department of the Air Force
•
Filing: 1966-04-07
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Granted: 1969-04-08
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Expires: 1986-04-07
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Hough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/54; C23C16/545; C23C16/02; C23C16/0272; C23C16/50; C23C16/503; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2958; Y10T428/296
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |