Patents by Inventor Donald R. Leonard

Donald R. Leonard 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).

  • Patent number: 5120452
    Abstract: A process for treating wastewater the improvement which comprises admixing with the wastewater at least 0.5 percent by weight of a solution consisting of hypochlorous acid having a pH of less than 3 to prepare disinfected wastewater having substantially no available chlorine residual.The novel process of the present invention provides rapid, intimate mixing of the highly pure, highly acidic hypochlorous acid solution with the wastewater stream to disinfect wastewater bodies while minimizing unwanted side effects. The process eliminates the need for storing and handling pressurized gaseous or liquid chlorine.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 9, 1992
    Assignee: Olin Corporation
    Inventors: Richard C. Ness, Budd L. Duncan, Sudhir K. Mendiratta, Donald R. Leonard
  • Patent number: 5118426
    Abstract: A process for sanitizing impotable water the improvement which comprises admixing with the impotable water a solution consisting of hypochlorous acid containing at least 0.5 percent by weight of HOCl and having a pH of less than 3 to prepare potable water having an available chlorine residual.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 2, 1992
    Assignee: Olin Corporation
    Inventors: Budd L. Duncan, Richard C. Ness, Sudhir K. Mendiratta, Donald R. Leonard
  • Patent number: 4650821
    Abstract: The present invention relates to a novel acrylic composition, novel acrylic castings prepared therefrom, and a novel process for the preparation of the acrylic castings. The composition comprises methyl methacrylate, about 0.5 to 20% by weight of a carboxylated cellulose ester, and about 1 to 100 ppm of a vanadium promoter. Optionally, a heat dissipative material, such as a plasticizer or an additional monomer, can also be employed. In accordance with the process of the present invention, an acrylic monomer comprising methyl methacrylate is combined with about 0.5 to 20% by weight of a carboxylated cellulose ester so as to form an easily pourable syrup, about 1 to 100 ppm of a vanadium promoter is added to the syrup and the resulting solution is poured into a suitable mold, and the solution is cured at room temperature so as to form a hard acrylic casting.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: March 17, 1987
    Assignee: Eastman Kodak Company
    Inventor: Donald R. Leonard
  • Patent number: 4603160
    Abstract: The present invention relates to a novel acrylic composition, novel acrylic castings prepared therefrom, and a novel process for the preparation of the acrylic castings. The composition comprises methyl methacrylate, about 0.5 to 20% by weight of a carboxylated cellulose ester, and about 1 to 100 ppm of a vanadium promoter. Optionally, a heat dissipative material, such as a plasticizer or an additional monomer, can also be employed. In accordance with the process of the present invention, an acrylic monomer comprising methyl methacrylate is combined with about 0.5 to 20% by weight of a carboxylated cellulose ester so as to form an easily pourable syrup, about 1 to 100 ppm of a vanadium promoter is added to the syrup and the resulting solution is poured into a suitable mold, and the solution is cured at room temperature so as to form a hard acrylic casting.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: July 29, 1986
    Assignee: Eastman Kodak Company
    Inventor: Donald R. Leonard