Patent US5447509A successfully refreshed from Google Patents.
US2495023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discriminator circuit
Assignee: Individual
•
Filing: 1945-05-03
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Granted: 1950-01-17
•
Expires: 1965-05-03
Abstract
No abstract record available.
Inventors
- 👤 Paul B Sebring
- 👤 Brooks Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/08; H03D3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2371285A
Cited
US1697945A
Cited
US1921022A
Cited
US2121103A
Cited
US2309481A
Cited
US2415468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |