Patents by Inventor John A. Dupont

John A. Dupont 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).

  • Formaldehyde stabilized coating compositions
    Patent number: 4165318
    Abstract: Coating compositions which contain a mildew-controlling amount of an isothiazolone are stabilized against chemical decomposition of the isothiazolone by the addition of formaldehyde or a compound which releases formaldehyde under basic conditions.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: August 21, 1979
    Assignee: Rohm and Haas Company
    Inventors: Stanley A. Greenfield, John A. Dupont
  • Formaldehyde stabilized coating compositions
    Patent number: 4129448
    Abstract: Coating compositions which contain a mildew-controlling amount of an isothiazolone are stabilized against chemical decomposition of the isothiazolone by the addition of formaldehyde or a compound which releases formaldehyde under basic conditions.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: December 12, 1978
    Assignee: Rohm and Haas Company
    Inventors: Stanley A. Greenfield, John A. Dupont
  • Prevention of fouling of marine structures such as boat hulls
    Patent number: 4127687
    Abstract: A method of coating marine structures including marine vessel hulls is disclosed, the method comprising painting the surfaces of the structure to be exposed to fouling conditions in salt water including sea water and brackish water, with a paint containing certain 3-isothiazolones in an amount to control marine plant and animal life such as algae, hydroids, and barnacles.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: November 28, 1978
    Assignee: Rohm and Haas Company
    Inventor: John A. Dupont
  • Metal compound stabilized coating compositions
    Patent number: 4031055
    Abstract: Coating compositions which contain a mildew controlling amount of an isothiazolone are stabilized against chemical decomposition of the isothiazolone by the addition of a metallic compound. Among the compounds which can be used are the acetates, carbonates, chlorides, bromides, nitrates, sulfates, phosphates, and oxides of cadmium, cobalt, copper, lead, manganese, mercury, nickel, silver and zinc.
    Type: Grant
    Filed: May 28, 1975
    Date of Patent: June 21, 1977
    Assignee: Rohm and Haas Company
    Inventors: John A. Dupont, Walter Kooch, Joseph D. Scott