Patents by Inventor Roland Spiegler

Roland Spiegler 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).

  • Polysiloxane-polyoxyethylene-polyoxypropylene triblock copolymers and defoaming compounds containing them
    Patent number: 5804099
    Abstract: Polysiloxane-polyoxyethylene-polyoxypropylene triblock copolymers having the general formula: ##STR1## as well as compounds for the defoaming of aqueous dispersion paints that are disclosed contain the copolymers as effective defoaming components.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: September 8, 1998
    Assignee: Th. Goldschmidt AG.
    Inventors: Wernfried Heilen, Hans-Leo Karminski, Michael Keup, Otto Klocker, Stefan Silber, Roland Spiegler, Roland Sucker
  • Use of organofunctionally modified polysiloxanes for defoaming diesel
    Patent number: 5613988
    Abstract: A method of defoaming diesel fuel by adding an organofunctionally modified polysiloxane of the general Formula I ##STR1## wherein R.sup.1 are alkyl groups with 1 to 4 carbon atoms or aryl groups with the proviso that at least 80% of the R.sup.1 groups are methyl groups,R.sup.2 are the same or different in the molecule30 to 90% of R.sup.2 having the same meaning as R.sup.1, and70 to 10% of R.sup.2 consisting of a mixture of R.sup.2A and R.sup.2B groups which differ in polarity,is described. The inventive polysiloxane is added in an amount of 0.5 to 50 ppm, based on the diesel fuel.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: March 25, 1997
    Assignee: Th. Goldschmidt AG.
    Inventors: Roland Spiegler, Michael Keup, Kerstin Kugel, Peter Lersch, Stefan Silber