Patents by Inventor Andre E. Asselin

Andre E. Asselin 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).

  • Lubricating oil for inhibiting rust formation
    Patent number: 5397487
    Abstract: A combination of succinic anhydride amine derivatives and tetra propenyl succinic acid derivative rust inhibitors has been found to be synergistically effective in reducing the formation of rust in lubricating oils.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: March 14, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Lilianna Z. Pillon, Lloyd E. Reid, Andre E. Asselin
  • Method for improving the demulsibility of base oils
    Patent number: 5282960
    Abstract: Lube oil basestocks having an oil/water interfacial tension (.gamma. o/w) of less than 41 mN/m, preferably less than about 35 mN/m which exhibit unacceptable demulsibility can have their demulsibility performance improved by contacting said lube oil basestock with an acidic ion exchange resin, such as Amberlyst AR-15, or with silica. The treated lube oil base stock exhibits an oil/water interfacial tension (.gamma. o/w) of at least about 41 mN/m, preferably at least about 42 mN/m.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: February 1, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Liliana Z. Pillon, Andre E. Asselin
  • Wax isomerate having a reduced pour point
    Patent number: 5229021
    Abstract: The addition of a polyalkylmethacrylate having a weight average molecular weight of at least 600,000 has been found to be effective in reducing the pour point of a wax isomerate to a level that cannot be obtained with conventional pour point depressants. In a preferred embodiment, the wax isomerate is a slack wax isomerate.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 20, 1993
    Assignee: Exxon Research & Engineering Company
    Inventors: Lillanna Z. Pillon, Andre E. Asselin
  • Lubricating oil having improved rust inhibition and demulsibility
    Patent number: 5227082
    Abstract: The rust inhibiting and demulsibility performance of a lubricating oil can be synergistically enhanced by incorporating a rust inhibitor having at least one COOH acid group and a particular class of pyridine derivatives.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: July 13, 1993
    Assignee: Exxon Research and Engineering Company
    Inventors: Lilianna Z. Pillon, Andre E. Asselin
  • Lubricating oil having an average ring number of less than 1.5 per mole containing a succinic anhydride amine rust inhibitor
    Patent number: 5225094
    Abstract: The rust inhibition capability of a lubricating oil having an average ring number per mole of less than 1.5 can be enhanced by adding a rust inhibitor that is capable of reducing the oil/water interfacial tension to between about 1 to about 4 mN/m.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: July 6, 1993
    Assignee: Exxon Research and Engineering Company
    Inventors: Lilianna Z. Pillon, Andre E. Asselin, Gerald A. MacAlpine
  • Wax isomerate having a reduced pour point
    Patent number: 5149452
    Abstract: A combination of a low and a high molecular weight polyalkylmethacrylate has been found to be effective in reducing the pour point of a wax isomerate to a level that cannot be obtained with conventional pour point depressants. In a preferred embodiment, the wax isomerate is a slack wax isomerate.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: September 22, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Gerald A. MacAlpine, Partick M. E. Halls, Andre E. Asselin