Patents by Inventor John Castrogiovanni, Jr.

John Castrogiovanni, Jr. 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).

  • Combining dispersant viscosity index improver and detergent additives for lubricants
    Patent number: 5314632
    Abstract: Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index polymer, like dispersancy-substituted polyolefins, and detergent, like overbased, oil-soluble, metal salts, before adding dispersant package.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: May 24, 1994
    Assignee: Texaco Inc.
    Inventors: Brian L. Papke, Issac D. Rubin, John Castrogiovanni, Jr.
  • Combining dispersant viscosity index improver and detergent additives for lubricants
    Patent number: 5294354
    Abstract: Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index improver, like dispersant nitrogen-substituted polyolefins, and detergent, like select overbased, oil-soluble, metal salts, before adding dispersant package.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: March 15, 1994
    Assignee: Texaco Inc.
    Inventors: Brian L. Papke, Isaac D. Rubin, John Castrogiovanni, Jr.