Patent US3515991A successfully refreshed from Google Patents.
US2964622A
Expired / Lapsed
US
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Image suppressed superheterodyne receiver
Assignee: GTE Sylvania Inc
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Filing: 1957-10-21
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Granted: 1960-12-13
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Expires: 1977-10-21
Abstract
No abstract record available.
Inventors
- 👤 Fire Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/16; H03D7/165; H03D7/18
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |