Patent JPS5017223A successfully refreshed from Google Patents.
US2972199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dragline excavator
Assignee: Caterpillar Global Mining LLC
•
Filing: 1958-10-30
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Granted: 1961-02-21
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Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Learmont Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/46; E02F3/48; E02F9/00; E02F9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2015629A
Cited
US2080163A
Cited
US2073539A
Cited
US2633649A
Cited
GB655950A
Cited
US2574646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |