Patent US5546039A successfully refreshed from Google Patents.
US2865627A
Expired / Lapsed
US
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Fluid-type spring
Assignee: Unisys Corp
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Filing: 1955-06-10
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Granted: 1958-12-23
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Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Warren F Clement
- 👤 Joseph E Zupanick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:43
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/018; B64; B64C; B64C13/00; B64C13/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1087305A
Cited
US1371648A
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US2538618A
Cited
US2523198A
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US2601867A
Cited
US2724565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |