Patent US2699494A successfully refreshed from Google Patents.
US2699494A
Expired / Lapsed
US
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Suppressed carrier single side band radio transmission system
Assignee: Hartford National Bank and Trust Co
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Filing: 1951-03-23
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Granted: 1955-01-11
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Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
- 👤 Albricht Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H04B1/302; H04B1/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1449372A
Cited
US1458949A
Cited
US2065826A
Cited
US2193801A
Cited
US2273023A
Cited
US2530614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |