US2500574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic tube circuit for high frequency
Assignee: Individual
•
Filing: 1944-04-27
•
Granted: 1950-03-14
•
Expires: 1964-04-27
Abstract
No abstract record available.
Inventors
- 👤 Rudenberg Hermann Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:00
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/065; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065; H01J25/00; H01J25/78; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/10; H03D1/00; H03D1/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2096459A
Cited
US1863052A
Cited
US2020310A
Cited
US2064469A
Cited
US2233126A
Cited
US2122538A
Cited
US2204375A
Cited
US2129669A
Cited
US2197041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |