Patents by Inventor William J. Hopwood

William J. Hopwood 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).

  • Patent number: 11105057
    Abstract: Embodiments are directed to a street sweeper. The street sweeper may include a hopper, a pickup head, and a magnet bar. The pickup head may have an intake portion that is fluidly coupled to the hopper. The magnet bar may be disposed rearward of the intake portion of the pickup head.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 31, 2021
    Inventor: William J. Hopwood
  • Publication number: 20190226169
    Abstract: Embodiments are directed to a street sweeper. The street sweeper may include a hopper, a pickup head, and a magnet bar. The pickup head may have an intake portion that is fluidly coupled to the hopper. The magnet bar may be disposed rearward of the intake portion of the pickup head.
    Type: Application
    Filed: January 22, 2018
    Publication date: July 25, 2019
    Inventor: William J. Hopwood
  • Patent number: 5110348
    Abstract: Novel herbicidal compounds of the general formula ##STR1## in which X represents a phenyl group substituted in the 2-position and optionally substituted in one or more of the 3-, 4-, 5- and 6-positions, the 2-substituent being a cyano group, or a group of the general formula CQNR.sup.1 R.sup.2 or COQR.sup.3 where Q represents an oxygen or sulphur atom and each of R.sup.1, R.sup.2 and R.sup.3 represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl, alkenyl, alkynyl, phenyl or phenalkyl group, or R.sup.1 and R.sup.2 jointly represent a hydrocarbon chain;Y represents an optionally substituted phenyl group; L represents an oxygen or sulphur atom; andZ represents a hydrogen atom or an optionally substituted alkyl, cycloalkyl, alkenyl, alkynyl, phenyl or phenalkyl group;and salts of such compounds.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: May 5, 1992
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventor: William J. Hopwood