US2807657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a thermopile
Assignee: North American Aviation Corp
•
Filing: 1953-12-21
•
Granted: 1957-09-24
•
Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Jenkins
- 👤 Max A Nadler
- 👤 Bert J Sherwood
- 👤 Ernest J Zeilberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:06
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/01; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49085; Y10T29/4981; Y10T29/49813; Y10T29/4998; Y10T29/49982; Y10T29/49986
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |