US2445933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled blocking tube oscillator
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1945-01-23
•
Granted: 1948-07-27
•
Expires: 1965-01-23
Abstract
No abstract record available.
Inventors
- 👤 Beste Harold Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:56
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/10; H03K4/12; H03K4/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1896534A
Cited
US2193850A
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US2230546A
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US2358297A
Cited
US2297742A
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US2396439A
Cited
US2415567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |