US2641692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile radio telephone system
Assignee: AT&T Inc
•
Filing: 1949-08-27
•
Granted: 1953-06-09
•
Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:26
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1910972A
Cited
US2064958A
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US2148578A
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US2198901A
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US2265056A
Cited
US2277469A
Cited
US2280421A
Cited
US2326290A
Cited
US2431167A
Cited
US2521696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |