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Patent US2775646A successfully refreshed from Google Patents.
US2775646A
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Single-sideband apparatus
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-11-23
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Granted: 1956-12-25
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Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Grosjean Johan Adriaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:40
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88; H04J; H04J1/00; H04J1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1717064A
Cited
US1641431A
Cited
GB302901A
Cited
US2262764A
Cited
US2270385A
Cited
US2261628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |