US2501093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency mixer
Assignee: United States, WAR, Secretary of
•
Filing: 1945-05-30
•
Granted: 1950-03-21
•
Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2142159A
Cited
US2253589A
Cited
US2378944A
Cited
US2260844A
Cited
US2408420A
Cited
US2423416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |