US2516447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for chemical treatment
Assignee: Individual
•
Filing: 1947-02-24
•
Granted: 1950-07-25
•
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 02:46
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)
US438606A
Cited
US700033A
Cited
US911567A
Cited
US1445935A
Cited
US1383881A
Cited
US1446639A
Cited
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 |