Patents Represented by Attorney Mary E. Picken

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  • Sealant composition
    Patent number: 4546166
    Abstract: This polyurethane sealant composition for construction materials or automotive parts cures quickly without foaming and comprises an isocyanate-terminated prepolymer and a curing agent consisting of a polyhydroxy compound, a polyamine compound, a monoamine compound, and a curing agent.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: October 8, 1985
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Masahiro Niinomi, Yukihiro Okubo, Yoshinori Igarashi, Masashi Yoshinari
  • Process for oxygen bleaching paper pulp using melamine as a viscosity stabilizer
    Patent number: 4526651
    Abstract: This invention is a process for maintaining pulp viscosity while enhancing brightness during the oxygen bleaching stage or stages of pulp preparation in the manufacture of paper comprising adding an effective amount of melamine to paper pulp prior to the oxygen bleaching stage.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: July 2, 1985
    Assignee: Melamine Chemicals, Inc.
    Inventor: G. Graham Allan
  • Sealer for polyester and method of use to obtain laminates
    Patent number: 4500606
    Abstract: A sealer for solid polyester composition to reduce evolution of vapors at temperature 190.degree. C. or higher for 1 hour or more and to improve the bond at these temperatures with isocyanate polyurethane adhesives, epoxy adhesive or acrylic adhesive, the sealer comprising a mixture of 100 to 1000 parts of phenol-formaldehyde resin, 90 to 110 parts of a polyvinyl acetal resin, 10 to 40 parts of epoxy resin, and sufficient solvent to render the mixture brushable, sprayable or flowable.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: February 19, 1985
    Assignee: Ashland Oil, Inc.
    Inventors: Thomas G. Rabito, Stephen M. Oswalt, Richard L. Cline
  • Process for bleaching paper pulp using melamine as a viscosity stabilizer
    Patent number: 4487656
    Abstract: A process for maintaining pulp viscosity while enhancing brightness during the bleaching stage or stages of pulp preparation in the manufacture of paper comprising adding an effective amount of melamine to paper pulp prior to or during the bleaching stage. One example adds melamine to one bleach stage of a chlorine bleaching sequence. One example adds melamine to one bleach stage of a chlorine bleaching sequence.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: December 11, 1984
    Assignee: Melamine Chemicals, Inc.
    Inventor: G. Graham Allan
  • Process for bleaching paper pulp using caffeine or guanine as a viscosity stabilizers
    Patent number: 4484980
    Abstract: A process for maintaining pulp viscosity during the bleaching stage or stages of pulp preparation in the manufacture of paper comprising adding an effective amount of caffeine or guanine prior to or during the bleaching stage. One example adds caffeine or guanine to one bleach stage of a chlorine bleaching sequence.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: November 27, 1984
    Assignee: Melamine Chemicals, Inc.
    Inventor: G. Graham Allan
  • High strength melamine-urea fertilizer granules
    Patent number: 4421545
    Abstract: This invention relates to an improved annealing process for preparing melamine-urea fertilizer granular agglomerates having increased crush strength.
    Type: Grant
    Filed: January 13, 1982
    Date of Patent: December 20, 1983
    Assignee: Melamine Chemicals, Inc.
    Inventor: George M. Crews
  • Process for molding corrosion resistant fuel cell collecting plates
    Patent number: 4359438
    Abstract: Durable bipolar fuel cell collecting plates are molded from resin bonded graphite and furfural wetting agent.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: November 16, 1982
    Assignee: Ashland Oil, Inc.
    Inventors: James T. Hoggins, Golden F. Watts
  • Cost reduction of acid curing foundry binders with alkylated aromatic hydrocarbon solvents
    Patent number: 4336342
    Abstract: Binder Compositions comprising a solution of furan foundry binders in an alkylated aromatic hydrocarbon solvent result in a more cost efficient binder. The cost efficiency is achieved without significant loss of physical properties of the foundry cores and molds which are formed using the binder. In instances the binder compositions of this invention exhibit improved physical properties.
    Type: Grant
    Filed: March 16, 1981
    Date of Patent: June 22, 1982
    Assignee: Ashland Oil, Inc.
    Inventors: William R. Dunnavant, Young D. Kim