US3442352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator control system
Assignee: Otis Elevator Co
•
Filing: 1965-10-13
•
Granted: 1969-05-06
•
Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Otto Albert Krauer
- 👤 Sidney Howard Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:50
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/46; B66B1/52; B66B1/24; B66B1/28; B66B1/30; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1427
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2629847A
Cited
US2699226A
Cited
US2858493A
Cited
US2918987A
Cited
US3146857A
Cited
US3155891A
Cited
US3350612A
Cited
US3297110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |