US2472705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division carrier multiplex telephone system
Assignee: Individual
•
Filing: 1944-07-17
•
Granted: 1949-06-07
•
Expires: 1964-07-17
Abstract
No abstract record available.
Inventors
- 👤 John H Homrighous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:17
CPC Classifications
H; H04; H04J; H04J3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2289048A
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US2387018A
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US2434697A
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US2395467A
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US2434698A
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US2430471A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |