US2639211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistylus facsimile machine
Assignee: Western Union Telegraph Co
•
Filing: 1949-03-25
•
Granted: 1953-05-19
•
Expires: 1969-03-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Hallden
- 👤 Douglas M Zabriskie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:11
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/14; H04N1/00567
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997137A
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US1339556A
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US1698737A
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US2212970A
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US2278919A
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US2375267A
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US2384722A
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US2451365A
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US2442561A
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US2442150A
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US2437242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |