US2504408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric door operator with auxiliary operating means
Assignee: Consolidated Car Heating Co Inc
•
Filing: 1945-03-29
•
Granted: 1950-04-18
•
Expires: 1965-03-29
Abstract
No abstract record available.
Inventors
- 👤 Percy M Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/605; E05F15/40; E05F15/41; E05F15/611; E05F15/616; E05F15/622; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/214; E05Y2201/23; E05Y2201/244; E05Y2900/00; E05Y2900/50; E05Y2900/51; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2259811A
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US2390117A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |