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US3484009A
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US
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Automatic shift mechanism for two wheel-four wheel drive vehicle
Assignee: Caterpillar Inc
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Filing: 1968-04-22
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Granted: 1969-12-16
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Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Gail G Barbee
- 👤 John W Mortimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:02
CPC Classifications
B; B60; B60K; B60K23/00; B60K23/08; E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2851115A
Cited
US3300002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |