US3379133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulation control for a hydraulic circuit
Assignee: Caterpillar Inc
•
Filing: 1966-04-29
•
Granted: 1968-04-23
•
Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Willard T Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:28
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20507; F15B2211/20515; F15B2211/2053; F15B2211/20546; F15B2211/20553; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/3056; F15B2211/3059; F15B2211/315; F15B2211/31523; F15B2211/31541; F15B2211/32; F15B2211/329; F15B2211/40; F15B2211/405; F15B2211/40507; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50536; F15B2211/515; F15B2211/5151; F15B2211/55; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/7058; F15B2211/71; F15B2211/80; F15B2211/86; F15B2211/8613; Y; Y10; Y10S; Y10S74/00; Y10S74/01
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |