Patents by Inventor Louis G. Coffee

Louis G. Coffee 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).

  • Maraging steel
    Patent number: 4871511
    Abstract: The present invention is directed to maraging steels, and particularly to a maraging steel of the cobalt-free type possessing such a combination of strength and fracture toughness that it is suitable for use in respect of demanding applications requiring product forms of very substantial section size.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: October 3, 1989
    Assignee: Inco Alloys International, Inc.
    Inventors: Darrell F. Smith, Jr., Louis G. Coffee