Patents by Inventor Rolf Buser

Rolf Buser 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).

  • Reduction clearing of disperse dyes
    Patent number: 4286961
    Abstract: The present invention relates to an after-dyeing treatment process for synthetic/cellulosic fibre mixed substrates which have been dyed with at least one disperse and at least one reactive dye in which after fixation, the dyed or printed substrate is reductively treated at a neutral to alkaline pH with an aqueous solution containing reducing agent, whereby non-bound disperse dyestuff is decomposed such that it does not re-build up on the substrate whilst the fixed reactive dyestuff remains substantially unaffected.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: September 1, 1981
    Assignee: Sandoz Ltd.
    Inventors: Rolf Buser, Francis Palacin, Georg Robert, Franz Somm