US2254031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relaxation oscillation generator
Assignee: EMI Ltd
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Filing: 1938-11-01
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Granted: 1941-08-26
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Expires: 1958-11-01
Abstract
No abstract record available.
Inventors
- 👤 Faudell Charles Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/10; H03K4/26; H03K4/39; H03K4/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-08-25 | 1945-02-24 | 1945-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-08-25 | 1949-02-24 | 1949-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-08-25 | 1953-02-24 | 1953-08-26 | $7700.00 | Window Closed / Lapsed |