US2838140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic dash-pot controller for an actuator
Assignee: Individual
•
Filing: 1955-11-03
•
Granted: 1958-06-10
•
Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Marlin B Rasmusson
- 👤 Robert J Betschart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; B; B60; B60G; B60G2202/00; B60G2202/30; B60G2202/32; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/40576; F15B2211/40584; F15B2211/415; F15B2211/41527; F15B2211/41536; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/80; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US897676A
Cited
DE448706C
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US2554774A
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US2604953A
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US2580751A
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US2715389A
Cited
US2720946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |