Patents by Inventor Russell L. Vermillion

Russell L. Vermillion 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).

  • Coating of fine particles in polyurethane block copolymer binder
    Patent number: 4286022
    Abstract: Coating of fine particles such as magnetizable particles in a binder which is a soluble hydroxyl-terminated polyurethane block copolymer comprising soft or flexible blocks synthesized from polyester or polyether diols and hard blocks synthesized from aliphatic diols containing tertiary amine and p,p'-diphenylmethane diisocyanate. The block copolymer is capable of dispersing as well as acting as a binder for the particles.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: August 25, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell L. Vermillion, William A. Bernett
  • Magnetic recording medium having segmented copolyester binder
    Patent number: 4025694
    Abstract: Magnetic recording tape, the binder of which is a segmented copolyester of crystallizable ester units ##STR1## and amorphous ester units ##STR2## where R.sub.1 may be the divalent radical of adipic acid, R.sub.2 may be the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 may be R.sub.1 or the divalent radical of C.sub.36 dimer acid, R.sub.4 may be R.sub.2 or the divalent radical of a polyetherglycol of 200-4000 molecular weight.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: May 24, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Wayne A. Pletcher, Russell L. Vermillion