Patents by Inventor David W. Shepherd

David W. Shepherd 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: 5127948
    Abstract: Water-based compositions which are usable in the formulation of inks, particularly for flexographic printing, containing an acrylic copolymer and a resin, rosin or rosin derivative, in the absence of any protein component. Rosin esters may also be used. A proportion of the acidity of the resin or resin derivative can be neutralized by a base such as ethanolamine to form a soap which disperses the rosin. The copolymer preferably has a glass transition temperature of 0.degree. C. or lower.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: July 7, 1992
    Assignee: EKA Nobel Landskrona AB
    Inventor: David W. Shepherd
  • Patent number: 4789098
    Abstract: An apparatus for separating out absorbed and entrained moisture from fuel used in a motor vehicle or heating system. A baffle plate exposed to infrared radiation forms the primary functional moisture separating device.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: December 6, 1988
    Inventors: David W. Shepherd, Michelle L. Shepherd
  • Patent number: 4378089
    Abstract: Surface irrigation apparatus comprises a carriage movable along an irrigation canal. A dam is supported by the carriage in such a way that water flowing along the canal is incident upon the dam and is checked thereby and the carriage is pushed along the canal in the direction of flow. The carriage is provided with means for arresting its movement at desired positions along the canal. Preferably, the arresting means comprises on the carriage one or more arms which are releaseably engageable with stops on the canal although the arresting means could take the form of one or more brakes operated in accordance with the position of the carriage. The carriage also has means, such as syphon tubes, for transferring water from the canal to land to be irrigated.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: March 29, 1983
    Assignee: Tate & Lyle Limited
    Inventors: John D. Wilken, Martin E. Parkes, Graham G. Curtis, David W. Shepherd