US3500854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve device
Assignee: ZF Friedrichshafen AG
•
Filing: 1967-03-27
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Granted: 1970-03-17
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Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 Johannes Altmeppen
- 👤 Albert Steidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:18
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F15; F15B; F15B11/00; F15B11/16; F15B13/00; F15B13/02; F15B13/022; F16K11/02; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/45; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/515; F15B2211/5159; F15B2211/55; F15B2211/70; F15B2211/71; F15B2211/78; F15B2211/781; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2582
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |