US1709102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for elevators
Assignee: Otis Elevator Co
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Filing: 1927-04-18
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Granted: 1929-04-16
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Expires: 1947-04-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Waite
- 👤 Frank L Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/36; B66B1/40
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) | 1932-04-15 | 1932-10-15 | 1933-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-04-15 | 1936-10-15 | 1937-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-04-15 | 1940-10-15 | 1941-04-16 | $7700.00 | Window Closed / Lapsed |