US3751527A
Expired / Lapsed
US
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Process for deliquefying,purifying and blending polymers
Assignee: Rohm and Haas Co
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Filing: 1971-11-18
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Granted: 1973-08-07
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Expires: 1991-11-18
Abstract
Abstract THE PRESENT INVENTION IS CONCERNED WITH SEPARATION OF THE LIQUID FROM THE SOLIDS OF AN EMULSION POLYMER LATEX IN SUCH A MANNER AS TO ACHIEVE REMOVAL AS WELL OF WATERSOLUBLE COMPONENTS, SUCH AS EMULSIFIERS, CATALYSTS, AND OTHER MATERIALS WHICH, THOUGH NEEDED TO PRODUCE THE LATEX, ARE UNDESIRABLE CONTAMINANTS WHEN THE LATEX IS USED FOR SOME PURPOSES. IT IS ALSO CONCERNED WITH AN EFFICIENT PROCESS FOR THE BLENDING OF THE POLYMER SOLIDS OF A LATEX WITH ANOTHER POLYMER. THESE OBJECTIVES ARE ACCOMPLISHED BY SPECIAL ADAPTATION AND MODIFICATION OF A SCREWOR WORM-TYPE OF PRESS OR EXTRUSION EQUIPMENT.
Inventors
- 👤 N Bortnick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:17
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/14; B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/48; B29B7/487; B29B7/80; B29B7/84; B29B7/842; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/763; B29C48/03; Y; Y10; Y10S; Y10S260/00; Y10S260/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |