Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-09-20
2005-09-20
Hightower, P. Hampton (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S284000, C525S326100, C525S327900, C528S480000, C528S492000
Reexamination Certificate
active
06946524
ABSTRACT:
Processes for producing polyester amides, by reacting a polyisobutylene with a first reagent selected from the group consisting of at least monounsaturated acids having from 3 to 21 carbon atoms and derivatives thereof; and a second reagent selected from the group consisting of monoethanolamine and alkylamines of the general formula R—NH2, wherein R represents an alkyl group having from 1 to 4 carbon atoms; are described. The polyester amides thus produced and their uses in stabilizing asphaltenes in crude oil and crude oil derivatives are also described.
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Birnbrich Paul
Breuer Wolfgang
Groffe Didier
Herold Claus-Peter
Hof Matthias
Cognis Deutschland GmbH & Co. KG
Hampton Hightower P.
Heslin Rothenberg Farley & & Mesiti P.C.
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