Patents by Inventor Rudi Berkhof

Rudi Berkhof has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Demulsifiers for breaking petroleum emulsions
    Patent number: 5164116
    Abstract: Demulsifiers which contain compounds of formula IR--O--Z.sub.n --O--(AO).sub.x H (I)wherein R is a linear or branched, saturated or unsaturated C.sub.1-18 alkyl radical, Z.sub.n is an oligoglycosyl radical with n=1 to 5 hexose or pentose units or mixtures thereof, AO is an ethylene oxide, propylene oxide or butylene oxide radical or mixtures thereof and x is 1 to 100, are useful for breaking water-in-oil petroleum emulsions. Such demulsifiers have a low specificity and are biodegradable.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: November 17, 1992
    Assignee: Huels Aktiengesellschaft
    Inventors: Rudi Berkhof, Herman Kwekkeboom, Dieter Balzer, Norbert Ripke