Patent US2967940A successfully refreshed from Google Patents.
US2967940A
Expired / Lapsed
US
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Transistorized fm-ir detector
Assignee: Unisys Corp
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Filing: 1959-03-05
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Granted: 1961-01-10
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Expires: 1979-03-05
Abstract
No abstract record available.
Inventors
- 👤 Erb Theodor
- 👤 Walter G Egan
- 👤 Fredricks Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:37
CPC Classifications
H; H03; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/14
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |