Patent US3043277A successfully refreshed from Google Patents.
US3043277A
Expired / Lapsed
US
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Hydraulic door operator system and control means therefor
Assignee: Individual
•
Filing: 1960-07-20
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Granted: 1962-07-10
•
Expires: 1980-07-20
Abstract
No abstract record available.
Inventors
- 👤 Carlson Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:42
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; Y; Y10; Y10S; Y10S60/00; Y10S60/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212998A
Cited
GB540183A
Cited
US2367248A
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US2715389A
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US2586442A
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US2676462A
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US2739808A
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US2955576A
Cited
US2918905A
Cited
US2900791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |