US2883182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door opener
Assignee: LIFTRON CORP
•
Filing: 1955-03-25
•
Granted: 1959-04-21
•
Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Bornemann William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:44
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/673; E05F15/40; E05F15/41; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1833943A
Cited
US1959292A
Cited
US2011057A
Cited
US2000515A
Cited
US2037780A
Cited
US2253170A
Cited
US2407537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |