Patent US4988169A successfully refreshed from Google Patents.
US2431440A
Expired / Lapsed
US
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Vehicle spring suspension
Assignee: Individual
•
Filing: 1944-11-14
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Granted: 1947-11-25
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Expires: 1964-11-14
Abstract
No abstract record available.
Inventors
- 👤 Durward E Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:16
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1768494A
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US871920A
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US1952718A
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US1956549A
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US2045031A
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US2209632A
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US2229808A
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US2352446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |