US2858904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for an elevator closure
Assignee: Otis Elevator Co
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Filing: 1957-06-17
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Granted: 1958-11-04
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Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Heart Herbert Loeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:30
CPC Classifications
G; G05; G05D; G05D3/00; G05B; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34036; G05B2219/41; G05B2219/41329; G05B2219/43; G05B2219/43079; G05B2219/45; G05B2219/45242; G05B2219/49; G05B2219/49141
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |