US2988099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-operated control device
Assignee: Leuna Werke GmbH
•
Filing: 1958-01-22
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Granted: 1961-06-13
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Expires: 1978-01-22
Abstract
No abstract record available.
Inventors
- 👤 Langhans Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:03
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; G; G05; G05D; G05D9/00; G05D9/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR888226A
Cited
US2339469A
Cited
US2568506A
Cited
US2695030A
Cited
US2833411A
Cited
US2760511A
Cited
US2803258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |