Patent US2677202A successfully refreshed from Google Patents.
US2677202A
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US
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Hydraulic actuator for operating the apron and ejector of earthmoving scrapers
Assignee: Caterpillar Inc
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Filing: 1951-04-03
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Granted: 1954-05-04
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Expires: 1971-04-03
Abstract
No abstract record available.
Inventors
- 👤 Carl A Gustafson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:31
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/654; E02F3/657; E02F3/6454; E02F3/6481; E02F3/656
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2223829A
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US2329448A
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US2303650A
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US2406826A
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US2565850A
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US2567118A
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US2609622A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |