Patents by Inventor Harold S. Magaha

Harold S. Magaha 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 the preparation of zinc dialkyldithiophosphate
    Patent number: 4778906
    Abstract: A process for preparing a zinc dialkyldithiophosphate which comprises reacting phosphorus pentasulfide with an aliphatic monohydric alcohol in the presence of a hydrocarbyl polyol followed by a reaction with a basic zinc salt to produce a stabilized zinc dialkyldithiophosphate is provided.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: October 18, 1988
    Assignee: Texaco Inc.
    Inventors: Doris Love, Carmen M. Cusano, Joseph B. Biasotti, Harold S. Magaha
  • Anti-friction additives for lubricating oils
    Patent number: 4647389
    Abstract: A lubricating oil composition containing a product prepared by reacting a natural oil with a (C.sub.2 -C.sub.10) hydroxy acid and a polyamine whereby the lubricating oil is improved in anti-friction and other properties.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: March 3, 1987
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Harold S. Magaha, Raymond C. Schlicht
  • Borate esters of hydrocarbyl-substituted mono- and bis-succinimides containing polyamine chain linked hydroxyacyl groups and lubricating oil compositions containing same
    Patent number: 4554086
    Abstract: Lubricating oils of improved wear resistance and dispersancy are prepared containing borate esters of hydrocarbyl-substituted mono- and bis-succinimides containing polyamine chain linked hydroxyacyl groups.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: November 19, 1985
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Harold S. Magaha
  • Hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals and mineral oil compositions containing same
    Patent number: 4482464
    Abstract: A hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from about 8 to 400 carbon atoms, X is a divalent alkylene or secondary hydroxy-substituted alkylene radical having from 2 to 3 carbon atoms, A is hydrogen or a hydroxyacyl radical from the group consisting of glycolyl, lactyl, 2-hydroxymethyl propionyl and 2,2'-bis-hydroxymethyl propionyl radicals and in which at least 30 percent of said radicals represented by A are said hydroxyacyl radicals, x is a number from 1 to 6, and R' is a radical selected from the group consisting of --NH.sub.2, --NHA, or a hydrocarbyl substituted succinyl radical having the formula: ##STR2## in which R and A have the values noted above, and a hydrocarbon oil composition containing same are provided.
    Type: Grant
    Filed: February 14, 1983
    Date of Patent: November 13, 1984
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Raymond C. Schlicht, Harold S. Magaha