Patents by Inventor June E. Doyen

June E. Doyen 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).

  • Cement dust briquettes and process of production thereof
    Patent number: 4161411
    Abstract: Cement dust briquettes or pellets and process for producing same by compacting cement dust at compacting pressures sufficient to form briquettes or pellets having a high crushing strength and simultaneously with such formation encapsulating said briquettes or pellets with a mineral oil or the like.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: July 17, 1979
    Inventors: Nancy J. Sell, June E. Doyen