Patent US2887236A successfully refreshed from Google Patents.
US2887236A
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Material handling apparatus
Assignee: Otis Elevator Co
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Filing: 1956-05-07
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Granted: 1959-05-19
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Mindrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
B; B65; B65G; B65G67/00; B65G2814/00; B65G2814/03; B65G2814/0301; B65G2814/0311; B65G2814/0313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603374A
Cited
CA518896A
Cited
US2347456A
Cited
US2668631A
Cited
US2663443A
Cited
US2753060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |