US3490567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine with hydrodynamic retarder
Assignee: Caterpillar Inc
•
Filing: 1968-06-12
•
Granted: 1970-01-20
•
Expires: 1988-06-12
Abstract
No abstract record available.
Inventors
- 👤 Richard B Clark
- 👤 Charles T Darragh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
F; F16; F16D; F16D57/00; F16D57/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US890272A
Cited
US1472012A
Cited
US1948810A
Cited
US2284515A
Cited
US2381755A
Cited
US2958405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |