Patent US2930904A successfully refreshed from Google Patents.
US2930904A
Expired / Lapsed
US
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Temperature modifying means for semiconductor device
Assignee: 3M Co
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Filing: 1956-12-31
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Granted: 1960-03-29
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fritts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
H; H10; H10N; H10N10/00; H10W; H10W40/00; H10W40/20; H10W40/28; H10W72/00; Y; Y10; Y10S; Y10S165/00; Y10S165/905
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |