Patent US3057160A successfully refreshed from Google Patents.
US3057160A
Expired / Lapsed
US
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Hydraulic elevator control system
Assignee: J D GOULD Co
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Filing: 1960-03-28
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Granted: 1962-10-09
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 William M Russell
- 👤 Anthony P W Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:35
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/24; B66B1/34; B66B1/36; B66B1/40; B66B1/405; F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/406
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2102865A
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US2331026A
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US2694544A
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US2815921A
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US2894525A
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US2905190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |