Patent US3486418A successfully refreshed from Google Patents.
US3486418A
Expired / Lapsed
US
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Control system for dual motors
Assignee: Caterpillar Inc
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Filing: 1968-05-22
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Granted: 1969-12-30
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Expires: 1988-05-22
Abstract
No abstract record available.
Inventors
- 👤 John R Cryder
- 👤 Jesse L Field Jr
- 👤 Kenneth R Lohbauer
- 👤 James E Scheidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:51
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06
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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |