Patent US3516518A successfully refreshed from Google Patents.
US3516518A
Expired / Lapsed
US
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Elevator control system
Assignee: Otis Elevator Co
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Filing: 1968-06-27
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Granted: 1970-06-23
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Expires: 1988-06-27
Abstract
No abstract record available.
Inventors
- 👤 Otto Albert Krauer
- 👤 Kenneth Raymond Brooks
- 👤 Sidney Howard Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/28; B66B1/30; B66B1/34; B66B1/46; B66B1/52; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2629847A
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US2699226A
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US2918987A
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US3146857A
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US3350612A
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US3297110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |