Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2007-09-18
2007-09-18
Szekely, Peter (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C241S015000
Reexamination Certificate
active
11231176
ABSTRACT:
A method for producing a particulate polymer drag reducing agent, comprising granulating a bulk polymer DRA having an average size of greater than about 100 mm in the presence of a liquid wetting agent to form a granulated polymer DRA having an average size of from about 1 to about 100 mm. The granulated polymer DRA may then be ground to form a particulate polymer DRA having an average particle size of less than about 1 mm. The “wet” granulation process may advantageously enable one-step granulation and therefore simplified production of polymer DRAs. Examples of the liquid wetting agent include blends of glycols with water and/or an alcohol. Preferred production apparatus includes use of multiple rotary jaws for the granulation.
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Fairchild Keith D.
Kommareddi Nagesh S.
Mathew Thomas
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Szekely Peter
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