US2794913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile recording amplifier
Assignee: Western Union Telegraph Co
•
Filing: 1953-01-08
•
Granted: 1957-06-04
•
Expires: 1973-01-08
Abstract
No abstract record available.
Inventors
- 👤 George B Worthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:31
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/403
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2176663A
Cited
US2113214A
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US2289840A
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US2298657A
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US2423671A
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US2265689A
Cited
US2305842A
Cited
US2615943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |