Patent US3475841A successfully refreshed from Google Patents.
US3475841A
Expired / Lapsed
US
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Scraper with eccentrically driven teeth
Assignee: ROBERT E POOL
•
Filing: 1967-09-14
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Granted: 1969-11-04
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Expires: 1987-09-14
Abstract
No abstract record available.
Inventors
- 👤 Frank Delfino
- 👤 Robert E Pool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:36
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8155; E02F3/64; E02F3/6454; E02F3/6481; E02F3/65; E02F3/654; E02F3/658
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878037A
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US1919075A
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US2245544A
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US2690902A
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US2777680A
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US3238646A
Cited
US3219388A
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US3328904A
Cited
US3272559A
Cited
US3387890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |