US2893901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor junction
Assignee: Sprague Electric Co
•
Filing: 1957-01-28
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Granted: 1959-07-07
•
Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Lehovec Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:41
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; C; C22; C22F; C22F3/00; C30; C30B; C30B31/00; C30B31/04; H10D; H10D62/00; H10D62/10
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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |