Patents by Inventor Willi Bury

Willi Bury 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).

  • Sulfonated and oxidized indene polymers
    Patent number: 5753775
    Abstract: Sulfonated and oxidized indene polymers obtainable by(a) polymerization of indene or indene derivatives of the general formula I ##STR1## where R.sup.1 is hydrogen, methyl or ethyl and n is 1 or 2, or of mixtures which contain the compounds I as well as other copolymerizable and/or non-polymerizable organic compounds in an amount of at least 10% by weight,b) sulfonation of the polymer with a sulfonating agent at from 40.degree. to 130.degree. C., andc) non-chain-degrading oxidation of the polymer at from 80.degree. to 180.degree. C.These indene polymers are suitable for use as dispersants for example in dye and pigment preparations.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: May 19, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Beckmann, Stefan Erren, Ulf Baus, Norbert Zimmermann, Erich Kromm, Klaus Taeger, Eva-Marie Borschel, Willi Bury
  • Dye dispersants: aryl sulphonic acid-formaldehyde condensate or ligninsulfonate
    Patent number: 5186846
    Abstract: Dispersants of increased bioeliminability or biodegradability for use in dye and pigment preparations, as tanning aids, in plastics production and in crop protection formulations contain from 3 to 50% by weight of one or more aromatic or long-chain aliphatic carboxylic acids, salts thereof or anhydrides thereof or a mixture thereof.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: February 16, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Ralf Brueckmann, Willi Bury, Johannes P. Dix, Manfred Herrmann, Waldemar Dlugosch, Erich Kromm, Herbert Letter, Norbert Zimmermann, Wolf-Dieter Kermer, Klaus Taeger