Patents by Inventor Gustaaf Scherer

Gustaaf Scherer 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).

  • Patent number: 4295850
    Abstract: Stable dust-free commercial preparations of organic substances are described, which preparations comprise an organic substance especially a dyestuff or optical brightener in dry powder form enclosed in a covering, particularly in a sack or bag sealed on all sides, made from polyethylene oxide having a molecular weight of more than 200,000 and a thickness of 10 to 80.mu., which covering is soluble in the same medium as the content.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: October 20, 1981
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland Haberli, Hans Mollet, Gustaaf Scherer
  • Patent number: 4202838
    Abstract: Sulphonated condensation products which are obtained, irrespective of sequence, by reaction of an aromatic compound that contains at least two replaceable hydrogen atoms in the nucleus with a compound of the formula ##STR1## wherein X represents the direct bond or oxygen, Hal represents chlorine or bromine, and n is a number from 1 to 4, and sulphonation, and optionally by further condensation with formaldehyde or formaldehyde donors.The sulphonated condensation products are particularly effective as levelling agents and dispersants.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: May 13, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Alain Lauton, Roland Putzar, Hans-Ulrich Berendt, Gustaaf Scherer