Patents by Inventor Heinz Hefti

Heinz Hefti 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).

  • Stable bleaching detergents containing stilbene fluorescent whitening agents
    Patent number: 5035825
    Abstract: Detergents which, in addition to inorganic and/or organic peracids, contain specific stilbene compounds as fluorescent whitening agents. These detergents are stable for several months and already show the customary cleaning properties at washing temperatures of 20.degree.-60.degree. C.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: July 30, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Claude Eckhardt, Heinz Hefti, Hans R. Meyer, Kurt Weber
  • Storage-stable anionic liquid detergent compositions containing amphoteric distyryl derivative fluorescent whiteners
    Patent number: 4940555
    Abstract: Storage-stable anionic liquid detergent compositions containing fluorescent whitening agents of the class of the amphoteric distyryls. These detergent compositions cause no bleach spots when they come in contact with textile fabric.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: July 10, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Claude Eckhardt, Heinz Hefti
  • Liquid detergent compositions containing disulfonated fluorescent whitening agents: di-styryl-biphenyl or di-styryl-benzene derivatives
    Patent number: 4925595
    Abstract: Liquid detergent compositions which are stable on storage and contain fluorescent whitening agents from the class of the disulfonated distyrylbiphenyl and distyrylphenyl compounds; they do not produce bleach spots on direct contact with textile fabric. Some of the fluorescent whitening agents used are novel.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: May 15, 1990
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Hefti, Dieter Reinehr, Kurt Weber, Claude Eckhardt
  • Mixtures of fluorescent whitening agents
    Patent number: 4889655
    Abstract: Mixtures of fuorescent whitening agents comprising 5 to 45 parts by weight of 4,4'-bis(cyanovinyl)stilbene and 95 to 55 parts by weight of a compound of formula ##STR1## and the use of said mixtures and compositions containing them for whitening polyester fibres and textile material containing polyester fibres.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: December 26, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Hefti, Klaus Artz, Kurt Weber, Kurt Burdeska, Dieter Reinehr
  • Process for increasing the degree of whiteness of polyester-containing textile material
    Patent number: 4830763
    Abstract: A process for increasing the degree of whitness of polyester-containing textile material by the combined application of a fluorescent whitening agent and, as booster, a compound which fluoresces in the absorption range of said fluorescent whitening agent, and a composition for whitening polyester-containing textile material.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: May 16, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Hefti, Urs Lehmann, Dieter Reinehr, Jurgen Kaschig