Patent US2495685A successfully refreshed from Google Patents.
US2495685A
Expired / Lapsed
US
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Two-stage hydraulic pressure pump
Assignee: Individual
•
Filing: 1945-06-08
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Granted: 1950-01-31
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Expires: 1965-06-08
Abstract
No abstract record available.
Inventors
- 👤 Beaman Bernard
- 👤 Hulman Julius
- 👤 Robert A Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:24
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/20; F04B1/2007; F04B1/122; F04B1/124; F04B1/126; F04B1/2014; F04B1/2021; F04B1/2064; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/106; F04B23/12; F04B49/00; F04B49/22; F04B49/24
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) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |