Patents by Inventor Jeffrey F. Bradley

Jeffrey F. Bradley 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).

  • Tear resistant multilayer films based on sebacic acid copolyesters and articles incorporating such films
    Patent number: 6040061
    Abstract: A tear resistant film comprises at least three layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile sebacic acid based copolyester, and optionally, an intermediate material. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.
    Type: Grant
    Filed: October 1, 1992
    Date of Patent: March 21, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Ralph H. Bland, James M. Jonza, James D. Smith, Jeffrey F. Bradley, Kenneth B. Smith
  • Tear resistant multilayer films and articles incorporating such films
    Patent number: 5604019
    Abstract: A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at least one direction. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: February 18, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ralph H. Bland, James M. Jonza, James D. Smith, Richard C. Allen, Jeffrey F. Bradley, Kenneth B. Smith, Bruce D. Stambaugh
  • Tear resistant multilayer films and articles incorporating such films
    Patent number: 5427842
    Abstract: A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at least one direction. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: June 27, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ralph H. Bland, James M. Jonza, James D. Smith, Richard C. Allen, Jeffrey F. Bradley, Kenneth B. Smith, Bruce D. Stambaugh