US3388883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydropneumatic support column of adjustable length
Assignee: ZF Friedrichshafen AG
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Filing: 1966-02-14
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Granted: 1968-06-18
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Axthammer Ludwig
- 👤 Wossner Felix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/30; A47B; A47B9/00; A47B9/10; F; F16; F16F; F16F9/00; F16F9/06; F16F9/32; F16F9/3207; F16F9/3214; F16F9/34; F16F9/346; F16F9/56
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |