Patent US2140368A successfully refreshed from Google Patents.
US2140368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio receiver
Assignee: Westinghouse Electric Corp
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Filing: 1936-05-19
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Granted: 1938-12-13
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Expires: 1956-05-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Lyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/02; H02; H02N; H02N11/00; H02N11/006
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) | 1941-12-12 | 1942-06-13 | 1942-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-12 | 1946-06-13 | 1946-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-12 | 1950-06-13 | 1950-12-13 | $7700.00 | Window Closed / Lapsed |