Patent US2558339A successfully refreshed from Google Patents.
US2558339A
Expired / Lapsed
US
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Interference reducing radio receiving system
Assignee: Individual
•
Filing: 1947-08-18
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Granted: 1951-06-26
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Expires: 1967-08-18
Abstract
No abstract record available.
Inventors
- 👤 Sissman Louise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:57
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1228647A
Cited
US1476691A
Cited
US1960006A
Cited
US2109219A
Cited
US2218083A
Cited
FR802392A
Cited
US2280461A
Cited
US2415810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |