US2979908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control systems
Assignee: Warner and Swasey Co
•
Filing: 1960-01-04
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Granted: 1961-04-18
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Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 William M Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/17; B; B66; B66C; B66C13/00; B66C13/18; E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/283; E02F3/286; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; E02F9/2239; E02F9/2278; E02F9/2292; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/20584; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/3056; F15B2211/30565; F15B2211/3059; F15B2211/30595; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/32; F15B2211/329; F15B2211/70; F15B2211/71
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |