Patent US2551347A successfully refreshed from Google Patents.
US2551347A
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Vacuum hydraulic suspension system
Assignee: Individual
•
Filing: 1944-03-24
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Granted: 1951-05-01
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Expires: 1964-03-24
Abstract
No abstract record available.
Inventors
- 👤 Orley R Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:31
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/0152; B60G17/02; B60G17/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190403659A
Cited
US770128A
Cited
US1036340A
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US837086A
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US1371648A
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US1664510A
Cited
US1855064A
Cited
US1990517A
Cited
US2165465A
Cited
US2225515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |