Patents by Inventor George Steven Szappanos

George Steven Szappanos 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).

  • Method of operating spark-ignition four-stroke internal combustion engine
    Patent number: 6408812
    Abstract: This invention relates to a method of operating a spark ignition four-stroke internal combustion engine comprised of a valve train and a crankcase and equipped with an exhaust gas aftertreatment device, said method comprising: (A) operating said engine using a gasoline fuel composition, the exhaust gas from the operation of said engine being advanced through said aftertreatment device; (B) lubricating said crankcase using a first lubricating oil composition, said first lubricating oil composition optionally containing an extreme-pressure additive comprised of metal and phosphorus, provided the amount of phosphorus contributed to said first lubricating oil composition does not exceed about 0.04% by weight based on the weight of said first lubricating oil composition; and (C) lubricating said valve train using a second lubricating oil composition.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: June 25, 2002
    Assignee: The Lubrizol Corporation
    Inventors: William Bricker Chamberlin, III, John Kent Pudelski, George Steven Szappanos