Patent US2781844A successfully refreshed from Google Patents.
US2781844A
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Hydraulic hold-down for reciprocating ram
Assignee: Pacific Industrial Manufacturing Co
•
Filing: 1954-06-25
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Granted: 1957-02-19
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Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Pearson
- 👤 Rolland A Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:48
CPC Classifications
B; B23; B23D; B23D33/00; B23D33/08; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5696; Y10T83/869; Y10T83/8691; Y10T83/8693; Y10T83/8776; Y10T83/8821; Y10T83/8827; Y10T83/8837; Y10T83/8841; Y10T83/8853; Y10T83/8858; Y10T83/8864
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1881185A
Cited
US2269328A
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US2582889A
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US2523393A
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US2547656A
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US2652893A
Cited
GB641586A
Cited
US2699649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |