Patent US2805332A successfully refreshed from Google Patents.
US2805332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subminiature portable crystal radio receiver
Assignee: Individual
•
Filing: 1955-01-20
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Granted: 1957-09-03
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Expires: 1975-01-20
Abstract
No abstract record available.
Inventors
- 👤 Keith L Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:22
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/046; H04R9/047; H04B; H04B1/00; H04B1/06; H04B1/08; H04B1/086; H04B1/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US314156A
Cited
US407799A
Cited
US1219888A
Cited
GB204663A
Cited
US1687371A
Cited
US2576679A
Cited
US2554270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |