Patents Examined by Kai Vo
  • Battery separators with reduced splitting propensity
    Patent number: 6602593
    Abstract: A split resistant microporous membrane is provided for use in preparing a battery separator. The microporous membrane has a TD tensile strength to MD tensile strength ratio of from about 0.12 to about 1.2, preferably from about 0.5 to about 1. The microporous membrane is made by a process which includes the steps of preparing a film precursor by blown film extrusion at a blow-up ratio of at least 1.5, annealing the film precursor, and stretching the resultant annealed film precursor to form the microporous membrane.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: August 5, 2003
    Assignee: Celgard Inc.
    Inventors: Robert W. Callahan, Ron W. Call, Ken J. Harleson, Ta-Hua Yu
  • Disc-like plastic body with inlay portion
    Patent number: 6372320
    Abstract: The invention concerns a disc-like plastic body with inlay portion, essentially consisting of at least one composite filler body holding the inlay portion between itself. A visually pleasing plastic body which is easy and cheap to make is provided according to the invention by the fact that the filler body is encompassed by two lid-like films, one film after the fashion of a cup surrounding the filler body on one side and the other, opposite film after the fashion of a lid being applied to the opposite side of the filler body.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: April 16, 2002
    Assignee: HTP High Tech Plastic AG
    Inventors: Christian Schumi, Josef Pallanits, Harald Schermann
  • Coated article with internal stabilizing portion and method for making
    Patent number: 6372321
    Abstract: A coated article is provided with a coating stabilizing portion in a coating combination on a substrate of the article. The coating combination includes a coating diffusion portion on the substrate and an outer coating portion outwardly from the coating diffusion portion. The coating stabilizing portion is provided between the coating diffusion portion and the outer coating portion to inhibit diffusion of undesirable elements to an interface with the outer coating portion and to enhance mechanical properties.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: April 16, 2002
    Assignee: General Electric Company
    Inventors: Joseph D. Rigney, Elissa H. Lee, Jeffrey A. Conner, Michael J. Weimer