US2749631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple, adjustable blade scraper
Assignee: ERNEST S THOMPSON
•
Filing: 1953-01-02
•
Granted: 1956-06-12
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest S Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7622; E02F3/7627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189909880A
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US1799424A
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US1845851A
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US1966936A
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US2141693A
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US2311551A
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US2346757A
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US2548139A
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US2644252A
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US2622349A
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US2590143A
Cited
US2706881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |