Patent DE943739C successfully refreshed from Google Patents.
US3384873A
Expired / Lapsed
US
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Selective calling system
Assignee: Collins Radio Co
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Filing: 1965-01-22
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Granted: 1968-05-21
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Expires: 1985-01-22
Abstract
No abstract record available.
Inventors
- 👤 Sharma Roshan Lal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:31
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/18; H04W88/185; H04W88/187; G; G08; G08B; G08B3/00; G08B3/10; G08B3/1008; G08B3/1016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |