US3301027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp treatment apparatus
Assignee: Improved Machinery Inc
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Filing: 1965-05-10
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Granted: 1967-01-31
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 John P Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:09
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/10; B; B01; B01F; B01F27/00; B01F27/60; B01F27/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN A VERTICALLY POSITIONED VARIABLE RETENTION UPFLOW REACTION TOWER GENERALLY OF CIRCULAR CROSS-SECTION HAVING LIQUID-SUSPENSION INLET MEANS AT THE LOWER PORTION THEREOF, A PLURALITY OF OUTLET MEANS IN SAID TOWER VERTICALLY SPACED FROM EACH OTHER ABOVE SAID LIQUID-SUSPENSION INLET MEANS, VALVE MEANS ON AT LEAST ALL BUT THE UPPERMOST OF SAID OUTLET MEANS FOR SELECTIVELY CONTROLLING THE REMOVAL LEVEL OF SAID LIQUID-SUSPENSION WITHIN SAID TOWER, AND MEANS WITHIN SAID TOWER FOR CAUSING HELICAL MOVEMENT OF SAID LIQUID-SUSPENSION TO SAID REMOVAL LIQUID, THAT IMPROVEMENT IN WHICH: DILUTION LIQUID INLET MEANS ARE POSITIONED AT THE UPPER PORTION OF SAID TOWER, ABOVE AT LEAST ALL BUT THE UPPERMOST OF SAID OUTLET MEANS; AND MEANS ARE PROVIDED WITHIN SAID TOWER FOR CAUSING HELICAL MOVEMENT OF SAID DILUTION LIQUID TO SAID REMOVAL LEVEL; SAID DILUTION LIQUID MEANS ESTABLISHING IN OPERATION, A DILUTE LIQUID-SUSPENSION SUBSTANTIALLY AT SAID REMOVAL LEVEL, AND A RELATIVE STOPPING THEREAT OF ANY PROCEEDING REACTION.
Claim 2
Dependent Claim
152 words
IN A VERTICALLY POSITIONED VARIABLE RETENTION UPFLOW REACTION TOWER GENERALLY OF CIRCULAR CROSS-SECTION HAVING LIQUID-SUSPENSION INLET MEANS AT THE LOWER PORTION THEREOF, A PLURALITY OF OUTLET MEANS IN SAID TOWER VERTICALLY SPACED FROM EACH OTHER ABOVE SAID LIQUID-SUSPENSION INLET MEANS, VALVE MEANS ON AT LEAST ALL BUT THE UPPERMOST OF SAID OUTLET MEANS FOR SELECTIVELY CONTROLLING THE REMOVAL LEVEL OF SAID LIQUID-SUSPENSION WITHIN SAID TOWER, AND MEANS WITHIN SAID TOWER FOR CAUSING HELICAL MOVEMENT OF SAID LIQUID-SUSPENSION TO SAID REMOVAL LIQUID, THAT IMPROVEMENT IN WHICH: DILUTION LIQUID INLET MEANS ARE POSITIONED AT THE UPPER PORTION OF SAID TOWER, ABOVE AT LEAST ALL BUT THE UPPERMOST OF SAID OUTLET MEANS; AND MEANS ARE PROVIDED WITHIN SAID TOWER FOR CAUSING HELICAL MOVEMENT OF SAID DILUTION LIQUID TO SAID REMOVAL LEVEL; SAID DILUTION LIQUID MEANS ESTABLISHING IN OPERATION, A DILUTE LIQUID-SUSPENSION SUBSTANTIALLY AT SAID REMOVAL LEVEL, AND A RELATIVE STOPPING THEREAT OF ANY PROCEEDING REACTION.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |