Patents by Inventor Dewey G. Holland

Dewey G. Holland 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).

  • Delayed action catalysts for polyurethanes
    Patent number: 4165412
    Abstract: Novel salts of tertiary amines and alpha-substituted carboxylic acids have advantages as delayed action thermally activated catalyts such as in urethane and epoxy catalysis. Some salts of tertiary amines tend to dissociate reversibly when heated. However, the compounds of the present invention preferentially decompose, irreversibly, to generate carbon dioxide when heated.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: August 21, 1979
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ibrahim S. Bechara, Dewey G. Holland
  • Cell regulators in structural foams
    Patent number: 4151333
    Abstract: Cellular structure of blown structural polyphenylene oxide resins is regulated by incorporation of certain acrylamide polymers in the molding compositions thereof. The cell regulating acrylamide polymers may be homopolymers or co-polymers of acrylamide, or of substituted acrylamides or interpolymers of such acrylamide compounds with compounds containing a vinyl group.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: April 24, 1979
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Gerd M. Lenke, Elwood E. Huntzinger, Dewey G. Holland
  • Catalysis of organic isocyanate reactions
    Patent number: 4040992
    Abstract: Polymerization and condensation reactions of organic isocyanates are catalytically promoted by the use of N-hydroxyalkyl quaternary ammonium carbonylate salts, particularly in the production of polyisocyanurates and polyurethanes. Among the exemplary preferred catalysts are N-hydroxypropyl trimethyl ammonium salts of carboxylic acids such as those of formic and acetic acids and of fatty acids such as hexanoic and octanoic acids and the like.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: August 9, 1977
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ibrahim S. Bechara, Felix P. Carroll, Dewey G. Holland, Rocco L. Mascioli