US2810571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door actuator
Assignee: Individual
•
Filing: 1952-12-10
•
Granted: 1957-10-22
•
Expires: 1972-12-10
Abstract
No abstract record available.
Inventors
- 👤 Paul R Ferguson
- 👤 Harold W Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1018268A
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US1201761A
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US1429528A
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US1494135A
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US2184607A
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US2283577A
Cited
US2202303A
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US2522252A
Cited
US2606022A
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US2536489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |