Patent US20110240193A1 successfully refreshed from Google Patents.
US1458949A
Expired / Lapsed
US
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Carrier radiotelephone system
Assignee: AT&T Inc
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Filing: 1922-01-07
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Granted: 1923-06-19
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Expires: 1942-01-07
Abstract
No abstract record available.
Inventors
- 👤 Harold W Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:46
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-06-18 | 1926-12-18 | 1927-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-06-18 | 1930-12-18 | 1931-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-06-18 | 1934-12-18 | 1935-06-19 | $7700.00 | Window Closed / Lapsed |