US2139791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing dry rectifiers
Assignee: Individual
•
Filing: 1937-01-12
•
Granted: 1938-12-13
•
Expires: 1957-01-12
Abstract
No abstract record available.
Inventors
- 👤 Barrey Etienne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:32
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/07; H10D48/078; H10D48/071; H10D48/074; H10D48/075; H10P; H10P14/00; H10P14/20; H10P14/203; H10P14/34; H10P14/3402; H10P14/3434
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-12-12 | 1942-06-13 | 1942-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-12 | 1946-06-13 | 1946-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-12 | 1950-06-13 | 1950-12-13 | $7700.00 | Window Closed / Lapsed |