US2745823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of temperature in emulsion polymerization
Assignee: Phillips Petroleum Co
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Filing: 1951-12-04
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Granted: 1956-05-15
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Expires: 1971-12-04
Abstract
No abstract record available.
Inventors
- 👤 William C Hewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:31
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/06; B; B01; B01F; B01F35/00; B01F35/90; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J19/18; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; F28D1/00; F28D1/06; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00078; B01J2219/00087; B01J2219/00094; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE METHOD OF CONTROLLING THE TEMPERATURE OF POLYMERIZATION OF A MONOMERIC MATERIAL COMPRISING A CONJUGATED DIENE WHICH COMPRISES CHARGING A STREAM OF SAID MONOMERIC MATERIAL TO A SMOOTH-WALLED REACTION ZONE, CHARGING WATER, AN EMULSIFIER, AN OXIDATION AND AN ACTIVATOR TO SAID ZONE TO PROVIDE AN AQUEOUS EMULSION THEREIN, CIRCULATING A COOLING MEDIUM IN A PLURALITY OF SEPARATELY SPACED ELONGATED CONFINED PATHS BOUNDED BY WALLS OF HEAT TRANSFER MATERIAL LOCATED WITHIN SAID REACTION ZONE ADJACENT THE INNER WALL THEREOF TO REMOVE AN ADDITIONAL PORTION OF SAID HEAT OF REACTION, SUCH PATHS EXTENDING PRINCIPALLY IN A VERTICAL DIRECTION, STIRRING SAID EMULSION TO PRODUCE A WHIRLING MOVEMENT THEREOF ABOUT A VERTICAL AXIS OF SAID ZONE WITH INCREASING VELOCITY OF MOVEMENT PROCEEDING FROM SAID AXIS TOWARD THE WALLS OF THE REACTION ZONE, SAID VELOCITY BEING SUFFICIENT TO SWEEP AWAY PARTICLES OF POLYMERIC MATERIAL DEPOSITED ON THE WALLS DEFINING SAID CONFINED PATHS AND THUS TO PREVENT FOULING OF SAID WALLS, AND WITHDRAWING A POLYMERIZED PRODUCT FROM SAID REACTION ZONE.
Claim 2
Independent Claim
164 words
THE METHOD OF CONTROLLING THE TEMPERATURE OF POLYMERIZATION OF A MONOMERIC MATERIAL COMPRISING A CONJUGATED DIENE WHICH COMPRISES CHARGING A STREAM OF SAID MONOMERIC MATERIAL TO A SMOOTH-WALLED REACTION ZONE, CHARGING WATER, AN EMULSIFIER, AN OXIDATION AND AN ACTIVATOR TO SAID ZONE TO PROVIDE AN AQUEOUS EMULSION THEREIN, CIRCULATING A COOLING MEDIUM IN A PLURALITY OF SEPARATELY SPACED ELONGATED CONFINED PATHS BOUNDED BY WALLS OF HEAT TRANSFER MATERIAL LOCATED WITHIN SAID REACTION ZONE ADJACENT THE INNER WALL THEREOF TO REMOVE AN ADDITIONAL PORTION OF SAID HEAT OF REACTION, SUCH PATHS EXTENDING PRINCIPALLY IN A VERTICAL DIRECTION, STIRRING SAID EMULSION TO PRODUCE A WHIRLING MOVEMENT THEREOF ABOUT A VERTICAL AXIS OF SAID ZONE WITH INCREASING VELOCITY OF MOVEMENT PROCEEDING FROM SAID AXIS TOWARD THE WALLS OF THE REACTION ZONE, SAID VELOCITY BEING SUFFICIENT TO SWEEP AWAY PARTICLES OF POLYMERIC MATERIAL DEPOSITED ON THE WALLS DEFINING SAID CONFINED PATHS AND THUS TO PREVENT FOULING OF SAID WALLS, AND WITHDRAWING A POLYMERIZED PRODUCT FROM SAID REACTION ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |