US2472200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency magnetron circuit
Assignee: Individual
•
Filing: 1945-08-08
•
Granted: 1949-06-07
•
Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Everhart Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:27
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/042; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587; H03C; H03C3/00; H03C3/30; H03C3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |