Patent US2810883A successfully refreshed from Google Patents.
US2810883A
Expired / Lapsed
US
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Frequency sensitive visual indicator
Assignee: RAYMOND M WILMOTTE Inc
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Filing: 1955-04-18
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Granted: 1957-10-22
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carnine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:10
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J3/00; H03J3/02; H03J3/12; H03J3/14; H05; H05B; H05B33/00; H05B33/12; H05B33/22
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) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |