Patents by Inventor David P. Rule

David P. Rule 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).

  • Publication number: 20090101276
    Abstract: The invention provides a mold for use in a compression molding apparatus that has a frame part with a hole through its center; a bottom plunger; and a top plunger; wherein the plungers are fabricated to fit substantially snugly in the hole in the frame part, and wherein at least one plunger comprises at least one low-thermal conductivity insert. The mold is useful in compression molding processes used in the preparation of unitized membrane electrodes.
    Type: Application
    Filed: August 28, 2008
    Publication date: April 23, 2009
    Inventor: DAVID P RULE
  • Patent number: 7431875
    Abstract: The invention provides a mold for use in a compression molding apparatus that has a frame part (41) with a hole through its center; a bottom plunger (42); and a top plunger (43); wherein the plungers are fabricated to fit substantially snugly in the hole in the frame part, and wherein at least one plunger comprises at least one low-thermal conductivity insert (44, 44?). The mold is useful in compression molding processes used in the preparation of unitized membrane electrodes.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: October 7, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: David P. Rule
  • Patent number: 5501250
    Abstract: Method to delete and reintroduce individual yarns as needed when they are being fed to a textile process by cutting an individual yarn, that is being forwarded to the process, rapidly to prevent producing a disruptive tension change in the process or in other yarns being forwarded to the process to produce an upstream cut end of an individual yarn; holding the upstream cut end of said individual yarn in an elongated condition at a ready position for reintroducing to the process; and reintroducing said yarn at said ready position to the textile process according to the following steps; metering said individual yarn from said source at a controlled rate; passing said cut end of yarn with a first individual yarn forwarding jet for forwarding said cut end from said ready position and maintaining said cut end of yarn in an elongated condition during said metering; directing said elongated, cut end of yarn in a path past an individual yarn cutter; passing for forwarding said elongated cut end of yarn from said cutt
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: March 26, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald W. Edwards, Peter Popper, David P. Rule, William C. Walker