US2592891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically actuated closure operator
Assignee: Individual
•
Filing: 1949-11-25
•
Granted: 1952-04-15
•
Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Harvey H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:43
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/616; E05F15/622; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/214; E05Y2201/218; E05Y2201/22; E05Y2201/23; E05Y2201/244; E05Y2900/00; E05Y2900/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1674662A
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US1859364A
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US2011057A
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US1874926A
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US2301950A
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US2337902A
Cited
US2371336A
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US2400572A
Cited
US2504408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |