Patents by Inventor Iris Peters

Iris Peters 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).

  • Preparation of low molecular mass homopolymers of N-vinylpyrrolidone
    Patent number: 6187884
    Abstract: A process for preparing highly concentrated aqueous solutions of low molecular mass homopolymers of N-vinylpyrrolidone by free-radical solution polymerization in an aqueous medium with H2O2 as initiator comprises carrying out the polymerization in the presence of from 0.1 to 30% by weight, based on N-vinylpyrrolidone, of a polymerization regulator which is selected from the group consisting of C1-C6-alkanols, hydroxylamine salts and water-soluble compounds containing sulfur in bonded form.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: February 13, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Stephan Kothrade, Rainer Blankenburg, Iris Peters, Axel Sanner