US2987614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secrecy voice radio communication system
Assignee: Individual
•
Filing: 1952-02-06
•
Granted: 1961-06-06
•
Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Claudius H M Roberts
- 👤 Jr Wilbur S Hinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
H; H03; H03M; H03M1/00; H04; H04K; H04K1/00; H04K1/06; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1624596A
Cited
US1809070A
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US1996958A
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US2306435A
Cited
US2312835A
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US2321611A
Cited
US2527145A
Cited
US2725425A
Cited
US2730569A
Cited
US2777897A
Cited
US2766325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |