US2687298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating mechanism
Assignee: Individual
•
Filing: 1953-01-21
•
Granted: 1954-08-24
•
Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald E Maple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:56
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/681; E05F15/686; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1954813A
Cited
US1995773A
Cited
US2037085A
Cited
US2168152A
Cited
US2520855A
Cited
US2605100A
Cited
US2625390A
Cited
US2598709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |