US2432293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator car door control mechanism
Assignee: UNITED ELEVATOR SERVICE Inc
•
Filing: 1944-08-19
•
Granted: 1947-12-09
•
Expires: 1964-08-19
Abstract
No abstract record available.
Inventors
- 👤 Giovanni Joseph Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:56
CPC Classifications
B; B66; B66B; B66B13/00; B66B13/02; B66B13/12; B66B13/24; B66B13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1705803A
Cited
US1696328A
Cited
US1778459A
Cited
US1961938A
Cited
US1909064A
Cited
US1823962A
Cited
US2009342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |