US3145624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double acting hydraulic servo governor
Assignee: Caterpillar Inc
•
Filing: 1961-09-29
•
Granted: 1964-08-25
•
Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 John H Parks
- 👤 John G Wellwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:33
CPC Classifications
G; G05; G05D; G05D13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US715961A
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US2106684A
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US2197743A
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US2373684A
Cited
US2446149A
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US2721072A
Cited
US2928378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |