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US2665853A
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US
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Toothed cutting impeller for pulping solid materials in liquid suspension
Assignee: Black Clawson Co
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Filing: 1951-08-23
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Granted: 1954-01-12
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Expires: 1971-08-23
Abstract
No abstract record available.
Inventors
- 👤 Jr George B Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:07
CPC Classifications
C; C08; C08B; C08B17/00; A; A23; A23N; A23N1/00; A23N1/02; B; B29; B29B; B29B13/00; B29B13/10; D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/34; D21B1/345; D21B1/347
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |