Patents by Inventor Adolphus V. Gist

Adolphus V. Gist 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).

  • Process for preparing epoxy resins employing a phosphonium trifluoroacetate catalyst
    Patent number: 4496709
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium trifluoroacetate catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: January 29, 1985
    Assignee: The Dow Chemical Company
    Inventors: George A. Doorakian, Marsha A. Paul, Adolphus V. Gist
  • Process for preparing epoxy resins having improved physical properties when cured
    Patent number: 4410596
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: October 18, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Ross C. Whiteside, Jr., Adolphus V. Gist, George A. Doorakian
  • Epoxy resins having improved physical properties when cured
    Patent number: 4370465
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: January 25, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Ross C. Whiteside, Jr., Adolphus V. Gist, George A. Doorakian
  • Process for preparing epoxy resins having improved physical properties when cured using quaternary phosphonium catalysts
    Patent number: 4352918
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: October 5, 1982
    Assignee: The Dow Chemical Company
    Inventors: Ross C. Whiteside, Jr., Adolphus V. Gist, George A. Doorakian
  • Process for preparing epoxy resins having improved physical properties when cured using quaternary phosphonium catalysts
    Patent number: RE32951
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: June 13, 1989
    Assignee: The Dow Chemical Company
    Inventors: Ross C. Whiteside, Jr., Adolphus V. Gist, George A. Doorakian