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Patent US2942582A successfully refreshed from Google Patents.
US2942582A
Expired / Lapsed
US
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Hydraulic cylinders
Assignee: Dempster Brothers Inc
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Filing: 1957-09-05
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Granted: 1960-06-28
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Expires: 1977-09-05
Abstract
No abstract record available.
Inventors
- 👤 George R Dempster
- 👤 William A Herpich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:03
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1433
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1750597A
Cited
US1884022A
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US1928465A
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US1958960A
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US2264379A
Cited
US2821264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |