Patent US3100903A successfully refreshed from Google Patents.
US2628831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating mechanism
Assignee: DETROIT HOIST AND MACHINE Co
•
Filing: 1950-06-24
•
Granted: 1953-02-17
•
Expires: 1970-06-24
Abstract
No abstract record available.
Inventors
- 👤 Henry F Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:18
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05F15/635; E05F15/665; E05F15/668; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/43; E05Y2201/434; E05Y2201/60; E05Y2201/622; E05Y2201/674; E05Y2600/00; E05Y2600/40; E05Y2600/46; E05Y2900/00; E05Y2900/10; E05Y2900/106; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1441; Y10T24/1451
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1145881A
Cited
US1594513A
Cited
US1605728A
Cited
US1795452A
Cited
US1952681A
Cited
US1881015A
Cited
US2303263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |