Patents by Inventor Paul G. Elsey

Paul G. Elsey 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).

  • Thioether bis phenolic antioxidants
    Patent number: 4104255
    Abstract: Ortho-cyclopentyl-hydroxybenzyl sulfides (e.g. di-(3,5-dicyclopentyl-4-hydroxybenzyl)sulfide) are effective antioxidants.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: August 1, 1978
    Assignee: Ethyl Corporation
    Inventors: John C. Wollensak, Kju Hi Shin, Kryn G. Ihrman, Paul G. Elsey
  • Antioxidant
    Patent number: 4066562
    Abstract: Methylenebis(dicyclopentyl phenols) in which at least one cyclopentyl group is ortho to the phenolic hydroxy group are effective antioxidants in a broad range of organic materials including mineral and synthetic lubricating oil and polyolefins.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: January 3, 1978
    Assignee: Ethyl Corporation
    Inventors: John C. Wollensak, Kryn G. Ihrman, Paul G. Elsey