US2626319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistation duplex system
Assignee: Westinghouse Electric Corp
•
Filing: 1949-01-14
•
Granted: 1953-01-20
•
Expires: 1969-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robert C Cheek
- 👤 Paul L Newbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:16
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1773613A
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US2264397A
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US2294905A
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US2289048A
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US2440239A
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US2481915A
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US2430471A
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US2507116A
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US2484211A
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US2511616A
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US2511615A
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US2511617A
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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) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |