US2814709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of dry rectifiers
Assignee: Siemens Mobility Ltd
•
Filing: 1955-08-03
•
Granted: 1957-11-26
•
Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Walker Alec Hervey Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:55
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/048
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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |