Patents by Inventor Laura Martin

Laura Martin 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).

  • Partial crystallization method of amorphous plastic articles
    Patent number: 6168740
    Abstract: A plastic article is formed in an injection mold by injecting molten plastic into the injection mold at an elevated temperature, cooling the plastic from the molten condition to a solid condition, and crystallizing a portion of the plastic by slowing down the cooling of said portion.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: January 2, 2001
    Assignee: Husky Injection Molding Systems Ltd.
    Inventors: Michael Koch, Robert D. Schad, Laura Martin, James D. Sykes, Dan Stracovsky, Bruce Catoen
  • Rotary valve
    Patent number: 4501286
    Abstract: A valve structure including a valve body defining a valve chamber with a tapered bearing surface and a tapered valve member journaled in the tapered bearing surface. A spring-biased plunger mechanism constantly urges the valve member into slidable sealing engagement with the tapered bearing surface. A passage communicates between the valve chamber and the exterior of the valve body via the spring-biased plunger mechanism and is connected in fluid flow communication with a source of suitable fluid, whereby such fluid passes from the source into the valve chamber via the spring-biased plunger mechanism.
    Type: Grant
    Filed: January 20, 1983
    Date of Patent: February 26, 1985
    Assignee: Phillips Petroleum Company
    Inventors: Raymond G. Rohlfing, Laura A. Martin