Patents by Inventor Sam Maravilla

Sam Maravilla 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).

  • Basic oil well cement
    Patent number: 4098613
    Abstract: A versatile hydraulic basic oil well cement, compatible with retarders and most common field additives and able to perform its intended function over a wide variety of downhole conditions, particularly temperature and pressure, comprises a common moderate or high sulfate resistant clinker and a weight ratio of calcium sulfate hemihydrate to insoluble anhydrite of 20:80 to 45:55. It can be made either by adding controlled amounts of gypsum and insoluble anhydrite to the grinding circuit or by blending ground hemihydrate and insoluble anhydrite to ground clinker.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: July 4, 1978
    Assignee: United States Steel Corporation
    Inventors: Sam Maravilla, Stewart W. Tresouthick