Patent US2453489A successfully refreshed from Google Patents.
US2453489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency oscillator
Assignee: General Electric Co
•
Filing: 1944-08-12
•
Granted: 1948-11-09
•
Expires: 1964-08-12
Abstract
No abstract record available.
Inventors
- 👤 Irwin M Bruntil
- 👤 Earl F Reihman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:12
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2212231A
Cited
FR667751A
Cited
GB476906A
Cited
US2135672A
Cited
GB510226A
Cited
US2219648A
Cited
US2342896A
Cited
US2292254A
Cited
US2303388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |