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Patent US2612756A successfully refreshed from Google Patents.
US2612756A
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Means for protecting hydraulic pressure presponsive devices from the effects of fluid shock
Assignee: HANNIFIN Corp
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Filing: 1947-07-31
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Granted: 1952-10-07
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Victor W Peterson
- 👤 Otto J Maha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:25
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/28; B21J15/16; B21J15/22; F; F15; F15B; F15B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US902723A
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US1660720A
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US1847889A
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US2113161A
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US2308712A
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US2465758A
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US2437077A
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US2459902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |