Patents by Inventor Betty S. Johnson

Betty S. Johnson 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).

  • Synergistic compositions containing hydroxypropyl methanethiolsulfonate and methods of using same
    Patent number: 4650808
    Abstract: Compositions comprising 2-hydroxypropyl methanethiolsulfonate in combination with a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one show synergistic results in controlling the growth and proliferation of microorganisms in aqueous systems.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: March 17, 1987
    Assignee: Buckman Laboratories, Inc.
    Inventors: Oscar W. May, Betty S. Johnson
  • Slime control compositions and methods of using the same
    Patent number: 4293559
    Abstract: The present invention relates to certain compositions and processes useful for inhibiting the growth of microorganisms in water and, in particular, water used for industrial purposes; for example, in the manufacture of paper, in cooling water systems in effluent water treatment, and in secondary recovery petroleum operations. The novel processes and compositions of the present invention are processes or mixtures which show unexpected synergistic activity against microorganisms, including bacteria, sulfate-reducing bacteria, fungi, and algae, which produce slime in aqueous systems where such slime is objectionable from either an operational or aesthetic point of view. Specifically, the invention is directed to the use of compositions comprising 2-(thio-cyanomethylthio)benzothiazole and 2'-hydroxyethyl 2,3-dibromopropionate or 2'-hydroxyethyl 2-bromoacrylate.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: October 6, 1981
    Assignee: Buckman Laboratories, Inc.
    Inventors: John D. Buckman, Stanley J. Buckman, Betty S. Johnson, John D. Pera
  • Slime control compositions and methods of using the same
    Patent number: 4285765
    Abstract: The present invention relates to certain compositions and processes useful for inhibiting the growth of microorganisms in water and, in particular, water used for industrial purposes; for example, in the manufacture of paper, in cooling water systems, in effluent water treatment, and in secondary recovery petroleum operations. The novel processes and compositions of the present invention are processes or mixtures which show unexpected synergistic activity against microorganisms, including bacteria, sulfate-reducing bacteria, fungi, and algae, which produce slime in aqueous systems where such slime is objectionable from either an operational or aesthetic point of view. Specifically, the invention is directed to the use of compositions comprising 2-(thiocyanomethylthio)benzothiazole and 2,2-dibromo-3-nitrilopropionamide.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: August 25, 1981
    Assignee: Buckman Laboratories, Inc.
    Inventors: John D. Pera, Betty S. Johnson