Patents by Inventor Guenter Frey

Guenter Frey 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).

  • Removal of anionic compounds from water
    Patent number: 4425238
    Abstract: A process for removing anionic compounds from water which is recycled in manufacturing processes, and from waste water, by adding (1) water-soluble products obtained by reacting an alkylating agent, having an aromatic substituent, with a cationic polyelectrolyte and (2) mineral adsorbents and/or a magnesium salt, aluminum salt or iron salt, with formation and flocculation of water-insoluble reaction products.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: January 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Juergen Degen, Wolf Guender, Friedrich Linhart, Werner Auhorn, Guenter Frey, Werner Streit, Rolf Fikentscher
  • Coloring of paper
    Patent number: 4383834
    Abstract: A process for coloring paper with an acid dye and/or direct dye in an aqueous medium in the presence of a water-soluble reaction product of an alkylating agent, possessing an aromatic substituent, with a cationic polyelectrolyte.The process gives papers with high color strength and substantially avoids cylinder twosidedness of the coloration.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: May 17, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Juergen Degen, Wolf Guender, Guenter Frey, Werner Streit, Rolf Fikentscher, Klaus Wulz
  • Process for suppressing the foaming of detergents
    Patent number: 4151127
    Abstract: Certain melamine derivatives are added as anti-foam agents to detergents, cleaners and rinses.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: April 24, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Johannes Perner, Guenter Frey, Herbert Helfert, Rolf Fikentscher