Patents by Inventor Gerald E. Carkin, Jr.

Gerald E. Carkin, Jr. 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 recovery of values from secondary aluminum dross
    Patent number: 5198200
    Abstract: A process for the recovery of metallic aluminum, mixtures of salts, and an aluminum oxide-metallic aluminum product from secondary aluminum dross. The process includes treating the dross with leach water to dissolve the salt content. Magnesium chloride is preferably added to the leach water to maintain the pH in the range of about 7-8.5, thereby reducing ammonia production in the treating step and enhancing recovery of metallic aluminum.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: March 30, 1993
    Assignee: Aluminum Company of America
    Inventors: Daniel Yerushalmi, Gerald E. Carkin, Jr., Donald L. Stewart, Jr., Jan H. L. Van Linden