Patent US2502419A successfully refreshed from Google Patents.
US2502419A
Expired / Lapsed
US
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Electrically actuated recording unit
Assignee: Western Union Telegraph Co
•
Filing: 1945-02-03
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Granted: 1950-04-04
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Expires: 1965-02-03
Abstract
No abstract record available.
Inventors
- 👤 William D Cannon
- 👤 Cantor Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US473538A
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US613003A
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US2351353A
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US2049784A
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US1986583A
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US2170515A
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US2267465A
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US2306456A
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US2301220A
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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) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |