Patent US2521074A successfully refreshed from Google Patents.
US2521074A
Expired / Lapsed
US
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Fluid actuated suspension device for vehicles, aircraft, and the like
Assignee: Individual
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Filing: 1948-02-24
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Granted: 1950-09-05
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Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 Marston Walter Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/58; B64C25/60; F; F16; F16F; F16F9/00; F16F9/06; F16F9/08; F16F9/096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |