Patent US2497072A successfully refreshed from Google Patents.
US2497072A
Expired / Lapsed
US
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Torsion spring wheel suspension
Assignee: Individual
•
Filing: 1947-06-14
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Granted: 1950-02-14
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Expires: 1967-06-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur B Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:10
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/18; B60G11/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US819302A
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US2175562A
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US2060015A
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US2174063A
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US2226047A
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US2179410A
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US2290620A
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US2299900A
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US2295084A
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US2375754A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |