Patents Examined by Joesph L. Schofer
  • 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
  • Hydroxy-terminated polymers of butadiene
    Patent number: 3959244
    Abstract: Hydroxy-terminated polymers of butadiene having two hydroxy groups per molecule are prepared by polymerizing butadiene in a chain transfer solvent at a temperature of from about 50.degree. to about 170.degree.C. with t-butyl beta-hydroxyethyl peroxide as an initiator.
    Type: Grant
    Filed: August 27, 1973
    Date of Patent: May 25, 1976
    Assignee: Dart Industries Inc.
    Inventor: Norman G. Gaylord