Patents by Inventor Donald M. Chevako

Donald M. Chevako 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).

  • Apparatus for resin impregnation of a fibrous substrate
    Patent number: 5630874
    Abstract: Apparatus and process are described for impregnating a fibrous substrate with a thermosettable resin. The process involves the use of resin application means comprising a moving surface on which is positioned a liquid-form thermosettable resin in essentially uncured state, passing a fibrous web in countercurrent contact with the thermosettable resin so as to transfer the thermosettable resin into the fibrous web, and passing the resin-containing fibrous web to a heating zone to partially cure the resin and form a prepreg. The process is particularly suited for application of a solventless resin formulation to a glass web in the preparation of a prepreg for an electrical laminate.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 20, 1997
    Assignee: Shell Oil Company
    Inventors: Robert A. Tait, Walter R. Stelling, John J. Hartley, Donald M. Chevako
  • Process and apparatus for resin impregnation of a fibrous substrate
    Patent number: 5492722
    Abstract: Apparatus and process are described for impregnating a fibrous substrate with a thermosettable resin. The process involves the use of resin application means comprising a moving surface on which is positioned a liquid-form thermosettable resin in essentially uncured state, passing a fibrous web in countercurrent contact with the thermosettable resin so as to transfer the thermosettable resin into the fibrous web, and passing the resin-containing fibrous web to a heating zone to partially cure the resin and form a prepreg. The process is particularly suited for application of a solventless resin formulation to a glass web in the preparation of a prepreg for an electrical laminate.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: February 20, 1996
    Assignee: Shell Oil Company
    Inventors: Robert A. Tait, Walter R. Stelling, John J. Hartley, Donald M. Chevako