Patents by Inventor William J. Erlanson

William J. Erlanson 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).

  • Photopolymerization using copper ions
    Patent number: 4415417
    Abstract: Photopolymerization of monomers by visible light using a photoreducible dye, a reducing agent and a controlled level of copper ions allows for high molecular weight polymer formation. The molecular weight is found to be proportional to the copper ion concentration. At 10 to 1,000 ppb copper ion concentration, the molecular weight of the polymer is optimum.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: November 15, 1983
    Assignee: Calgon Corporation
    Inventors: Lee W. Bush, Marie S. Chan, Gary P. Craun, William J. Erlanson, Wood E. Hunter, Wallace B. Ramsey