US2989302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire door operating apparatus
Assignee: Individual
•
Filing: 1960-07-18
•
Granted: 1961-06-20
•
Expires: 1980-07-18
Abstract
No abstract record available.
Inventors
- 👤 Henry B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:01
CPC Classifications
A; A62; A62C; A62C2/00; A62C2/06; A62C2/18; E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05F1/00; E05F1/002; E05F1/006; E05F1/02; E05F1/025; E05F1/04; E05F1/046; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/214; E05Y2201/23; E05Y2201/244; E05Y2201/40; E05Y2201/404; E05Y2201/41; E05Y2201/422; E05Y2201/50; E05Y2800/00; E05Y2800/25; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E05Y2900/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |