Patent US2519463A successfully refreshed from Google Patents.
US2519463A
Expired / Lapsed
US
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Mercury type relay
Assignee: AT&T Inc
•
Filing: 1946-08-09
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Granted: 1950-08-22
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Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 Henry C Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:26
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1559714A
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US1834129A
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US1791888A
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US1892538A
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US1937746A
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US1950240A
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US2096440A
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US2116215A
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US2302546A
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US2309953A
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US2325785A
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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) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |