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US2981237A
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Hydraulic actuator control
Assignee: Individual
•
Filing: 1958-10-14
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Granted: 1961-04-25
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Expires: 1978-10-14
Abstract
No abstract record available.
Inventors
- 👤 Gratzmuller Jean Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:43
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/212; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30515; F15B2211/3056; F15B2211/30565; F15B2211/315; F15B2211/31523; F15B2211/31529; F15B2211/31541; F15B2211/31552; F15B2211/31558; F15B2211/31564; F15B2211/32; F15B2211/329; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |