Patents by Inventor Helmut Prochaska

Helmut Prochaska 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).

  • Process for producing spotted dyeings with pastes containing water-soluble resin or wax and particulate dyestuff
    Patent number: 3947246
    Abstract: A process for producing a spotted effect on synthetic fibre materials using dyestuff pastes which contain insoluble or scarcely soluble particles of one or a plurality of dyestuff preparations, said particles having a size of 10.mu. to 200.mu., preferable 40.mu. to 100.mu. and said dyestuff preparations consisting of a dyestuff, a resin or wax which is insoluble or scarcely soluble in water and optionally of a softener and/or tenside.
    Type: Grant
    Filed: November 21, 1973
    Date of Patent: March 30, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Johannes Eibl, Karlheinz Wolf, Helmut Prochaska