Patent US2606761A successfully refreshed from Google Patents.
US2606761A
Expired / Lapsed
US
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Hydraulic door actuator
Assignee: Individual
•
Filing: 1949-06-29
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Granted: 1952-08-12
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Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles G G Group
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:41
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1421002A
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GB289158A
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US1921008A
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FR678541A
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US1980617A
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US2058063A
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US2168719A
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US2166743A
Cited
US2206742A
Cited
US2293462A
Cited
US2341318A
Cited
US2338030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |