Patent US3870964A successfully refreshed from Google Patents.
US2744587A
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US
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Fluid buffer for elevators
Assignee: Montgomery Elevator Co
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Filing: 1952-09-27
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Granted: 1956-05-08
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Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
- 👤 Beck Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:03
CPC Classifications
B; B66; B66B; B66B5/00; B66B5/28; B66B5/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1434197A
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US2565617A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |