Patents by Inventor Donald C. Aldrich

Donald C. Aldrich 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).

  • Fiber reinforced resin preform
    Patent number: 5016516
    Abstract: Preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to a final composite article by fully or partially curing in a mold followed by post curing if required.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: May 21, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald C. Aldrich, Robert C. Buchanan, John F. Sollinger
  • Process for preparing a fiber reinforced resin matrix preform
    Patent number: 4846908
    Abstract: Process for preparing preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to final composite article by fully or partially curing in a mold followed by post curing if required.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald C. Aldrich, Robert C. Buchanan, John F. Sollinger
  • Water shutoff valve
    Patent number: 4589435
    Abstract: A water shutoff valve is disclosed in the preferred embodiment comprising a cylindrical body having a valve disk and water flow sensor therein. The sensor is operatively connected to a timer which automatically resets to zero upon interruption of water flow through the valve. The valve automatically closes upon continuous flow of water through the valve for a predetermined period of time, indicating a potential leak in the water supply line. The timer may be set for selected time intervals permitting the valve to remain open for short or long intervals as required.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: May 20, 1986
    Inventor: Donald C. Aldrich