Patent US2779752A successfully refreshed from Google Patents.
US2779752A
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Apparatus for chemical reactions passing through viscous phase
Assignee: EIDP Inc
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Filing: 1953-11-18
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Granted: 1957-01-29
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Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 William H Vining
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:31
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B01; B01F; B01F27/00; B01F27/80; B01F33/00; B01F33/25; B01F33/251; C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN APPARATUS FOR CONTINUOUSLY MIXING A VISCOUS REACTION MIXTURE A CYLINDER, AN AXIALLY DISPOSED ROTATABLE AGITATOR SHAFT WITHIN SAID CYLIDER, FREE FLOWING SPHERES OR BALLS ALL OF THE SAME SIZE AND IN NUMBERS SUBSTANTIALLY TO FILL SAID CYLINDER, FIXED BAFFLES ATTACHED TO THE INNER WALL OF SAID CYLINDER AND EXTENDING RADIALLY TO A DISTANCE EXCEEDING BY A SMALL FRACTION ONE BALL DIAMETER FROM SAID SHAFT, AGITATOR BLADES AATTACHED TO SAID SHAFT IN STAGGERED RELATION TO SAID BAFFLES AND EXTENDING RADIALLY TO A DISTANCE EXCEEDING BY A SMALL FRACTION ONE BALL DIAMETER FROM THE INNER WALL OF SAID CYLINDER, THE CLEARANCE BETWEEN THE BAFFLES AND THE NEXT ADJOINING AGITATOR BLADES BEING SLIGHTLY IN EXCESS OF TWO BALL DIAMETERS, AND INLET AND OUTLET MEANS FOR FEEDING REACTION REACTION MIXTURE TO THE REACTOR AND WITHDRAWING REACTION PRODUCTS AT A PREDETERMINED RATE, SAID INLET AND OUTLET MEANS BEING AT OPPOSITE ENDS OF SAID CYLINDER.
Claim 2
Dependent Claim
109 words
IN A PROCESS FOR THE ALCOHOLYSIS OF POLYVINYL ACETATE DISSOLVED IN METHANOL THE STEP CONSISTING OF PASSING THE ALCOHOLYSIS MIXTURE AFTEAR ALCOHOLYSIS OF ABOUT 30 TO 40% OF THE POLYVINYL ACETATAE HAS OCCURRED INTO A VERTICAL ELONGATED CYLINDRICAL VESSEL FILLED WITH BALLS ALL OF THE SAME SIZE AND SUBJECTING THE BALS TO RADICAL AGITATION IN A MANNER TO PREVENT SUBSTANTIAL INTERMIXING PARALLEL TO THE DIRECTION OF FLOW THROUGH SAID CYLINDRICAL VESSEL OF THE MIXTURE UNDERGOING ALCOHOLYSIS AND ADJUSTING THE RATE OF FLOW OF SAID MIXTURE THROUGH SAID VESSEL SO THAT SAID MIXTURE WILL LEAVE SAID VESSEL AFTER ABOUT 70 TO 80% ALCOHOLYSIS OF SAID VINYL ACETATE HAS BEEN EFFECTED.
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |