US1865752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tube
Assignee: Siemens and Halske AG
•
Filing: 1931-02-28
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Granted: 1932-07-05
•
Expires: 1951-02-28
Abstract
No abstract record available.
Inventors
- 👤 Gabor Dionys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:28
CPC Classifications
F; F16; F16D; F16D51/00; F16D51/46; F16D51/48; F16D51/50; C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046
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) | 1935-07-05 | 1936-01-04 | 1936-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-07-05 | 1940-01-04 | 1940-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-07-05 | 1944-01-04 | 1944-07-05 | $7700.00 | Window Closed / Lapsed |