Patents by Inventor William A. Cellich

William A. Cellich 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).

  • Composition for cleaning a gas turbine engine
    Patent number: 4834912
    Abstract: A composition and method for removing deposits (10) from the internal components (24) of a gas turbine engine (18) utilizing a cleaning composition (15) which comprises an aqueous solution of hydroxylamine sulfate, a chelating agent, a compound selected from the group consisting of ammonium sulfamate, ammonium sulfamide, and hydroxylamine-o-sulfonic acid, and, an alkaline pH modifying substance added in an amount sufficient to achieve a pH value of between 6.5 and 14. The method involves contacting the deposits with the cleaning composition, such as in an apply and soak type pattern, chemically dislodging the deposits from the component surfaces. The engine is rinsed to remove the dislodged deposits and residual cleaning composition.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: May 30, 1989
    Assignee: United Technologies Corporation
    Inventors: Henry M. Hodgens, II, William A. Cellich
  • Method for cleaning a gas turbine engine
    Patent number: 4713120
    Abstract: A composition and method for removing deposits (10) from the internal components (24) of a gas turbine engine (18) utilizing a cleaning composition (15) which comprises an aqueous solution of hydroxylamine sulfate, a chelating agent, a compound selected from the group consisting of ammonium sulfamate, ammonium sulfamide, and hydroxylamine-o-sulfonic acid, and, an alkaline pH modifying substance added in an amount sufficient to achieve a pH value of between 6.5 and 14. The method involves contacting the deposits with the cleaning composition, such as in an apply and soak type pattern, chemically dislodging the deposits from the component surfaces. The engine is rinsed to remove the dislodged deposits and residual cleaning composition.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: December 15, 1987
    Assignee: United Technologies Corporation
    Inventors: Henry M. Hodgens, II, William A. Cellich