Patents Examined by Melvyn I. Marquls
  • Erasable inks containing thermoplastic block copolymers
    Patent number: 4390646
    Abstract: An erasable ink containing a thermoplastic block copolymer, pigment particles, and a solvent. In a preferred embodiment, an erasable ink requiring little or no pressurization is provided by employing a mixture of radial and linear block copolymers and a mixed solvent system falling within a specific range of solubility parameter. Polybutene and poly-alpha-methylstyrene are preferred additives to decrease smearing tendency.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: June 28, 1983
    Assignee: The Gillette Company
    Inventor: Edward J. Ferguson
  • Wax-containing unsaturated polyester laminating composition with aromatic tertiary amine
    Patent number: 4296009
    Abstract: Failure of free radical catalyzed unsaturated polyester laminating compositions containing wax for suppression of styrene evaporation, but not more than about 10 weight percent of non-reinforcing filler, to develop interlaminar adhesion as great as similar compositions without wax can be at least partially overcome by incorporating at least about 0.1 weight percent of a tertiary monoamine having a single aromatic group and two alkyl or hydroxyalkyl groups on the amino nitrogen.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: October 20, 1981
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Edward J. Kerle, Terry R. Beaver