Patent US3471952A successfully refreshed from Google Patents.
US3471952A
Expired / Lapsed
US
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Earthmoving scraper with multiple articulated apron structure
Assignee: Caterpillar Inc
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Filing: 1966-10-27
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Granted: 1969-10-14
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert A Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:33
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/654; E02F3/657; E02F3/6454; E02F3/6481
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2207424A
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US2795872A
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US3052996A
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US3235983A
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US3105311A
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US3060601A
Cited
US3067888A
Cited
US3235984A
Cited
US3221424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |