US2947397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid clutch control for clamshell excavators
Assignee: Caterpillar Global Mining LLC
•
Filing: 1958-07-23
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Granted: 1960-08-02
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Expires: 1978-07-23
Abstract
No abstract record available.
Inventors
- 👤 William C Pietsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/46; E02F3/47; B; B66; B66C; B66C3/00; B66C3/12; B66C3/125; B66D; B66D1/00; B66D1/26; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0166; B66D2700/0175
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |