US3188240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper oxide insulation layer for thermoelectric devices
Assignee: Northrop Grumman Corp
•
Filing: 1961-09-11
•
Granted: 1965-06-08
•
Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Lee H Sam
- 👤 Thomas E Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:52
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/81; H10N10/817; H10N19/00; H10N19/101; Y; Y10; Y10S; Y10S165/00; Y10S165/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1844925A
Cited
US2543331A
Cited
GB587490A
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US2844638A
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GB824347A
Cited
US2970449A
Cited
US2966033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |