US2665129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric door operating mechanism
Assignee: National Pneumatic Co Inc
•
Filing: 1950-11-13
•
Granted: 1954-01-05
•
Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Durbin Vernon
- 👤 Charles T Button
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/73; Y; Y10; Y10S; Y10S246/00; Y10S246/01
Claims Analysis
Total Claims: 0
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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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |