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US2932694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rural carrier telephone transmission system
Assignee: AT&T Inc
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Filing: 1954-09-10
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Granted: 1960-04-12
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Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 Verl J Hawks
- 👤 Earl K Van Tassel
- 👤 David C Weller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:03
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/16; H04Q; H04Q5/00; H04Q5/02
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) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |