Patents by Inventor Allen J. Rolfes

Allen J. Rolfes 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 making overbased calcium sulfonate detergents using calcium oxide and a less than stoichiometric amount of water
    Patent number: 6268318
    Abstract: A.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: July 31, 2001
    Assignee: The Lubrizol Corporation
    Inventors: Allen J. Rolfes, Scot Eric Jaynes
  • Process for making overbased calcium sulfonate detergents using calcium oxide and a less than stoichiometric amount of water
    Patent number: 6015778
    Abstract: A process for producing an overbased oil soluble calcium sulfonate, comprising the steps of: (a) mixing a substrate comprising a sulfonic acid or a calcium salt of a sulfonic acid, with at least one alcohol, a diluent oil, a carboxylic acid, an acidic material, water and calcium oxide to form a mixture; (b) heating the mixture to its reflux point to form a neutral calcium salt of the acid moieties; (c) removing a substantial portion of distillable solvents to form an intermediate residue; (d) adding to the intermediate residue at least one alcohol, a surfactant, calcium oxide and water such that for every 100 parts of substrate, there are not more than 25 parts water to form an intimate mixture having a direct base number of 90-250; (e) heating said intimate mixture (d) to below its reflux point to form a heated intimate mixture; (f) passing gaseous carbon dioxide into the heated intimate mixture (e) to form an overbased calcium sulfonate and a mixture of calcium hydroxide, calcium carbonate and regenerated w
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: January 18, 2000
    Assignee: The Lubrizol Corporation
    Inventors: Allen J. Rolfes, Scot Eric Jaynes