Patents by Inventor John David, deceased Zech

John David, deceased Zech 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).

  • Ethers of polyglycerol
    Patent number: 3932532
    Abstract: Ethers of polyglycerols and an improved method of preparing said ethers are disclosed. The ethers are prepared by reacting a purified polyglycerol with an alpha olefin epoxide in the presence of an alkali metal alkoxide catalyst.
    Type: Grant
    Filed: June 1, 1973
    Date of Patent: January 13, 1976
    Assignee: ICI United States Inc.
    Inventors: Robert H. Hunter, John David, deceased Zech