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US2491402A
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Hydraulic system
Assignee: HPM Development Corp
•
Filing: 1945-09-10
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Granted: 1949-12-13
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Expires: 1965-09-10
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:41
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/05; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/3056; F15B2211/30565; F15B2211/32; F15B2211/321; F15B2211/325; F15B2211/329; F15B2211/35; F15B2211/70; F15B2211/77; F15B2211/7716; F15B2211/7725
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1521514A
Cited
US1943061A
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US1909166A
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US2043453A
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US2102865A
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US1989387A
Cited
US2157240A
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US2267177A
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US2254708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |