Patents by Inventor Dirk Wolfgram

Dirk Wolfgram 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).

  • Emulsifier-free oil-in-water emulsions of organopolysiloxanes and the use thereof in technical applications
    Publication number: 20050107523
    Abstract: The invention relates to emulsifier-free oil-in-water emulsions of organopolysiloxanes and the use thereof in technical applications.
    Type: Application
    Filed: November 16, 2004
    Publication date: May 19, 2005
    Inventors: Michael Gippert, Ralf Schnelle, Stefan Silber, Roland Sucker, Dirk Wolfgram
  • Polyacrylates and their use as degassing agents for paints and coatings
    Patent number: 6353068
    Abstract: Polyacrylates having an average molecular weight of from about 1000 to about 10,000 and the general formula where R4 is the radical of a known chain regulator or initiator, R1 is identical or different and is an alkyl radical, preferably of 1 to 4 carbon atoms, R2 is identical or different and is a saturated or unsaturated alkyl radical of 12 to 22 carbon atoms, R3 is a hydrocarbon radical which carries at least one (meth)acryloxy group, a is from 10 to 50, b is from 3 to 20, c is from 0 to 10, and the ratio a:b+c is from 0.25 to 4 and the ratio b:c is from 1:0 to 1:0.7 as degassing agents for paints and coatings.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: March 5, 2002
    Assignee: Th. Goldschmidt AG
    Inventors: Thomas Dietz, Eberhard Esselborn, Christian Psiorz, Ute Schick, Stefan Silber, Ellen Reuter, Dirk Wolfgram
  • Process for preparing dimethylmonochlorosilane
    Patent number: 5856548
    Abstract: The invention relates to a process for preparing dimethylmonochlorosilane (CH.sub.3).sub.2 Si(H)Cl by partial hydrogenation of dimethyldichlorosilane (CH.sub.3).sub.2 SiCl.sub.2 in a reaction system comprising magnesium hydride and aluminum chloride and an inert liquid organic vehicle while milling continually.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: January 5, 1999
    Assignee: Th. Goldschmidt AG
    Inventors: Jurgen Drose, Wilfried Knott, Dirk Wolfgram