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US2944401A
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Hydraulic elevator leveling system
Assignee: Montgomery Elevator Co
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Filing: 1956-10-29
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Granted: 1960-07-12
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Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Beck Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/34; B66B1/36; B66B1/40; B66B1/405; B66F; B66F7/00; B66F7/10; B66F7/16; B66F7/18; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |