Patent US2516447A successfully refreshed from Google Patents.
US2516447A
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US
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Method and apparatus for chemical treatment
Assignee: Individual
•
Filing: 1947-02-24
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Granted: 1950-07-25
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Expires: 1967-02-24
Abstract
No abstract record available.
Inventors
- 👤 Elmer R Burling
- 👤 John P Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/111; B01F27/07; B01F27/072; B01F27/0724; B01F27/112; B01F27/1123; D; D21; D21C; D21C9/00; D21C9/10; Y; Y10; Y10T; Y10T403/00; Y10T403/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD OF TREATING PULP COMPRISING: CONTINOUSLY ADVANCING A PULP SLURRY VERTICALLY UPWARD ALONG A CYLINDRICAL PATH; SUBJECTING ALL PULP ARRIVING AT A PREDETERMINED LEVEL TO A SLOW, POSITIVE, CONTINOUS, SMOOTH, RADIALLY OUTWARD DISPLACEMENT BY CAUSING SAID PULP TO FLOW ALONG A SUBSTANTIALLY CYCLOIDAL PATH AND REFLECTING FROM THE BOUNDARY OF SAID CYLINDRICAL PATH THE PULP
Claim 2
Independent Claim
56 words
A METHOD OF TREATING PULP COMPRISING: CONTINOUSLY ADVANCING A PULP SLURRY VERTICALLY UPWARD ALONG A CYLINDRICAL PATH; SUBJECTING ALL PULP ARRIVING AT A PREDETERMINED LEVEL TO A SLOW, POSITIVE, CONTINOUS, SMOOTH, RADIALLY OUTWARD DISPLACEMENT BY CAUSING SAID PULP TO FLOW ALONG A SUBSTANTIALLY CYCLOIDAL PATH AND REFLECTING FROM THE BOUNDARY OF SAID CYLINDRICAL PATH THE PULP
References Cited (Backward Citations)
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Cited
US700033A
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US911567A
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US1445935A
Cited
US1383881A
Cited
US1446639A
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US2431478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |