Patent US2181692A successfully refreshed from Google Patents.
US2181692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring suspension for automobiles
Assignee: Individual
•
Filing: 1938-04-27
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Granted: 1939-11-28
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Expires: 1958-04-27
Abstract
No abstract record available.
Inventors
- 👤 Crowell Gordon Walcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:53
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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-11-27 | 1943-05-29 | 1943-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-27 | 1947-05-29 | 1947-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-27 | 1951-05-29 | 1951-11-28 | $7700.00 | Window Closed / Lapsed |