Patents by Inventor Tim M. Swager

Tim M. Swager 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).

  • Ring opening polymerization of 3,4-dimethylene cyclobutene and derivatives thereof
    Patent number: 4645814
    Abstract: Highly conjugated, soluble polymers are prepared by ring opening polymerization of cyclobutenes of the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually selected from H, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, phenyl or R.sub.3 and R.sub.4 are combined into a divalent CR.sup.5, O, N=R or S group where R.sup.5 is H, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms with a mild ring opening olefin metathesis catalyst such as a metal carbene. Random copolymers or block copolymers may also be prepared with comonomers capable of olefin metathesis polymerization such as norbornene or cyclopentene.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: February 24, 1987
    Assignee: California Institute of Technology
    Inventors: Robert H. Grubbs, Tim M. Swager