Patents by Inventor Daniel B. England

Daniel B. England 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).

  • Bitumen and halogenated vinyl aromatic-conjugated diolefin block copolymer compositions
    Patent number: 5246987
    Abstract: A bitumen composition is provided which contains a block copolymer of one or more halogenated vinyl aromatic blocks and one or more conjugated diolefin blocks. The composition does not phase separate upon storage for five days at 160.degree. C. and has excellent ductility and elasticity. The utilization of halogenated block copolymers also results in improved high service temperature viscosity and moduli with excellent resistance to thermal cracking at low service temperatures. The block copolymer is preferably a hydrogenated block copolymer. The bitumen is preferably halogenated.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: September 21, 1993
    Assignee: Shell Oil Company
    Inventors: Michael A. Masse, James H. Collins, Daniel B. England