US2545894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noninterceptive radio communication system
Assignee: Individual
•
Filing: 1947-05-09
•
Granted: 1951-03-20
•
Expires: 1967-05-09
Abstract
No abstract record available.
Inventors
- 👤 Bessie S Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:12
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1326727A
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US1743588A
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US1356488A
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US1476003A
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US1688453A
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US1661692A
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US1889292A
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US1975486A
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US2058398A
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US2173154A
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US2301475A
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US2383908A
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US2458558A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |