Patent US2977134A successfully refreshed from Google Patents.
US2977134A
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US
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Device for controlling the air in air springs, especially for motor vehicles
Assignee: FRIED KRUPP MORTOREN und KRAFT
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Filing: 1958-09-11
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Granted: 1961-03-28
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Expires: 1978-09-11
Abstract
No abstract record available.
Inventors
- 👤 Helling Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:44
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/048; B60G17/0485; B60G17/052; B60G17/0521; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/101; G05D16/14; G05D16/18; G05D16/185; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/152; B60G2204/00; B60G2204/10; B60G2204/12; B60G2204/126; B60G2206/00; B60G2206/01; B60G2206/40; B60G2206/42; B60G2206/424; B60G2500/00; B60G2500/20; B60G2500/202; B60G2500/2021; B60G2500/204; B60G2500/2042; B60G2500/2044; B60G2600/00; B60G2600/21; Y; Y10; Y10S; Y10S267/00; Y10S267/01; Y10S280/00; Y10S280/01
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |