US2801844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door control
Assignee: Individual
•
Filing: 1955-06-02
•
Granted: 1957-08-06
•
Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 John F Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2003534A
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US2029678A
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US2075000A
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US2149177A
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US2173455A
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US2242706A
Cited
US2634124A
Cited
US2624569A
Cited
US2709583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |