US2696579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control system for door operation
Assignee: National Pneumatic Co Inc
•
Filing: 1948-11-04
•
Granted: 1954-12-07
•
Expires: 1968-11-04
Abstract
No abstract record available.
Inventors
- 👤 Veer John H Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:43
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/43; E05Y2201/434; E05Y2800/00; E05Y2800/73; E05Y2900/00; E05Y2900/50; E05Y2900/51
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) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |