US2980440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable displacement hydraulic system with resilient means for variablevalve auxiliary vehicle suspension
Assignee: Individual
•
Filing: 1955-11-03
•
Granted: 1961-04-18
•
Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Walker Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/26; Y; Y10; Y10S; Y10S267/00; Y10S267/02; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1642946A
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US2249402A
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US2323204A
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US2452105A
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US2592391A
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US2687311A
Cited
FR1079671A
Cited
US2755099A
Cited
US2825579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |