US2493658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic valve holder
Assignee: British Mechanical Productions Ltd
•
Filing: 1945-11-23
•
Granted: 1950-01-03
•
Expires: 1965-11-23
Abstract
No abstract record available.
Inventors
- 👤 Deakin Stanley Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:26
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/74; H01R33/76; H01R33/7607; H01R33/7614; H01R33/7628
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB320460A
Cited
US1771094A
Cited
US1780778A
Cited
US2087784A
Cited
US2154301A
Cited
US2109770A
Cited
US2235207A
Cited
US2283889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |