Patents by Inventor Waldo DeThomas

Waldo DeThomas 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).

  • Patent number: 3950441
    Abstract: An improved hydrogenation catalyst is provided comprising a high surface area amorphous or gamma alumina support carrying thereon from about 12 to about 20% by weight of nickel, about 1 to about 10% by weight of copper and from 0 to about 1.5% by weight of manganese. This catalyst is used as a second stage catalyst in the two stage hydrogenation of 1,4-butynediol to 1,4-butanediol.
    Type: Grant
    Filed: March 30, 1973
    Date of Patent: April 13, 1976
    Assignee: GAF Corporation
    Inventors: Stanley Rudoff, Waldo DeThomas