US1730747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for elevators
Assignee: Individual
•
Filing: 1928-12-01
•
Granted: 1929-10-08
•
Expires: 1948-12-01
Abstract
No abstract record available.
Inventors
- 👤 Scheinfeld Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:48
CPC Classifications
B; B66; B66B; B66B5/00; B66B5/02; B66B5/14; B66B5/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-10-07 | 1933-04-08 | 1933-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-10-07 | 1937-04-08 | 1937-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-10-07 | 1941-04-08 | 1941-10-08 | $7700.00 | Window Closed / Lapsed |