US2778338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal fluid shut off for hydraulic motor
Assignee: Shafer Valve Co
•
Filing: 1953-01-27
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Granted: 1957-01-22
•
Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 Homer J Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:41
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F15B15/20; F15B15/22; F15B15/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US612324A
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US1178695A
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US1674056A
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US1991634A
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US2141953A
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US2463931A
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GB574700A
Cited
US2556698A
Cited
US2550180A
Cited
US2540903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |