US2829499A
Expired / Lapsed
US
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Apparatus for intensifying hydraulic pressure
Assignee: ROPER ENGINEERING Co
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Filing: 1956-10-01
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Granted: 1958-04-08
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/32; B22D17/08; B22D17/10; B30; B30B; B30B15/00; B30B15/16; B30B15/161; F; F15; F15B; F15B11/00; F15B11/02; F15B11/028; F15B11/036; F15B15/00; F15B15/20; F15B15/204; F15B3/00; F15B2211/00; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/775
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |