Patents by Inventor Kevin D. Chambers

Kevin D. Chambers 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).

  • Battery separator for lithium polymer battery
    Patent number: 7794511
    Abstract: A battery separator for a lithium battery is disclosed. The separator has a microporous membrane and a coating thereon. The coating is made from a mixture of a gel forming polymer, a first solvent, and a second solvent. The first solvent is more volatile than the second solvent. The second solvent acts as a pore former for the gel-forming polymer.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: September 14, 2010
    Assignee: Celgard Inc.
    Inventors: C. Glen Wensley, Kevin D. Chambers
  • Battery separator for lithium polymer battery
    Publication number: 20040241550
    Abstract: A battery separator for a lithium battery is disclosed. The separator has a microporous membrane and a coating thereon. The coating is made from a mixture of a gel forming polymer, a first solvent, and a second solvent. The first solvent is more volatile than the second solvent. The second solvent acts as a pore former for the gel-forming polymer.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 2, 2004
    Inventors: C. Glen Wensley, Kevin D. Chambers
  • Explosion-proof separator for Li-ion secondary batteries
    Publication number: 20040086782
    Abstract: A battery separator for a lithium-ion secondary battery is a microporous membrane with an adjuvant. The microporous membrane is made of a thermoplastic. The adjuvant, in an effective amount, is mixed into the separator or coated thereon. The adjuvant is a material adapted to reduce or eliminate energy concentrations around the separator. The energy concentration is sufficient to initiate a reaction of the components of the lithium ion secondary battery.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 6, 2004
    Applicant: Celgard Inc.
    Inventors: Zhengming Zhang, Donald K. Simmons, Kevin D. Chambers, Pankaj Arora