Patents by Inventor Jacques Frey

Jacques Frey 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).

  • Process for the low pressure carburization of metal alloy parts
    Patent number: 5205873
    Abstract: A low pressure carburization process for metal alloy parts uses a fuel mixture consisting of hydrogen with 2 to 60% by volume ethylene. The fuel mixture is heated to a temperature between 820.degree. and 1100.degree. C. A furnace installation for carrying out the process includes a double vacuum tank or vessel arrangement with internal carburizing gas distribution, an annular space surrounding the vessel, a cover, thermocouples and a microcomputer control arrangement.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: April 27, 1993
    Assignee: Acieries Aubert & Duval
    Inventors: Andre Faure, Jacques Frey