Patent US3732848A successfully refreshed from Google Patents.
Patent US3433326A successfully refreshed from Google Patents.
US3433326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator control system
Assignee: Otis Elevator Co
•
Filing: 1965-10-13
•
Granted: 1969-03-18
•
Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Otto Albert Krauer
- 👤 Herbert Frederick Voigt
- 👤 Harvey Ronald Schor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:37
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/46; B66B1/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |