Patents by Inventor Charlotte M. Palmgren

Charlotte M. Palmgren 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).

  • Patent number: 6395149
    Abstract: The present invention provides a method of making electrically conductive light colored coated particles that are particularly useful for the manufacture of static dissipative compositions. The coated particles are useful for making static dissipative composites.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: May 28, 2002
    Assignee: 3M Innovative Properties Company
    Inventor: Charlotte M. Palmgren
  • Patent number: 6143405
    Abstract: The present invention provides electrically conductive, light colored coated particles that are particularly useful for the manufacture of static dissipative compositions. This invention also relates to static dissipative composites made with these coated particles.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: November 7, 2000
    Assignee: 3M Innovative Properties Company
    Inventor: Charlotte M. Palmgren
  • Patent number: 6045648
    Abstract: Multilayered film and film based assembly which are environmentally-compatible, and which exhibit one or more desirable characteristics of polyvinyl chloride (PVC) film and film based assemblies, such as clarity, flexibility and toughness, but without the environmental and health hazards associated with PVC materials, are provided. Also provided is a method of preparing such film and film based assembly.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 4, 2000
    Assignee: Minnesta Mining and Manufacturing Company
    Inventors: Charlotte M. Palmgren, Craig S. Chamberlain, Ching-Long Tsai, Daryl D. Dressler, Jon M. Nornberg, Dan L. Fanselow, Raymond L. Ferguson, Walton J. Hammar
  • Patent number: 5837088
    Abstract: A composition comprising: (1) a susceptor of magnetically coupled radio frequency energy comprising a non-magnetic particulate substrate, e.g., an electrically insulative material in particulate form, bearing a thin magnetic coating, e.g., a magnetic inorganic film, and (2) a matrix that is substantially non-reflective of radio frequency energy, e.g., silicone rubber, which matrix can be heated upon the composition's being subjected to magnetically coupled radio frequency energy. It has been discovered that thin magnetic coatings on non-magnetic particles provide energy transfer with induction heaters equal to or better than many commonly used solid susceptor particles. It has also been discovered that the temperature of the composition of this invention can be regulated so as not to exceed a predetermined temperature.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: November 17, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charlotte M. Palmgren, Craig S. Chamberlain, Brian J. Fish
  • Patent number: 5712044
    Abstract: Multilayered film and film based assembly which are environmentally-compatible, and which exhibit one or more desirable characteristics of polyvinyl chloride (PVC) film and film based assemblies, such as clarity, flexibility and toughness, but without the environmental and health hazards associated with PVC materials, are provided. Also provided is a method of preparing such film and film based assembly.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 27, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dan L. Fanselow, Raymond L. Ferguson, Walton J. Hammar, Lester B. Odegaard, Daryl D. Dressler, Jon M. Nornberg, Ching-Long Tsai, John H. Ko, Craig S. Chamberlain, Charlotte M. Palmgren
  • Patent number: 5529708
    Abstract: A composition comprising: (1) a susceptor of magnetically coupled radio frequency energy comprising a non-magnetic particulate substrate, e.g., an electrically insulative material in particulate form, bearing a thin magnetic coating, e.g., a magnetic inorganic film, and (2) a matrix that is substantially non-reflective of radio frequency energy, e.g., silicone rubber, which matrix can be heated upon the composition's being subjected to magnetically coupled radio frequency energy. It has been discovered that thin magnetic coatings on non-magnetic particles provide energy transfer with induction heaters equal to or better than many commonly used solid susceptor particles. It has also been discovered that the temperature of the composition of this invention can be regulated so as not to exceed a predetermined temperature.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: June 25, 1996
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Charlotte M. Palmgren, Craig S. Chamberlain, Brian J. Fish
  • Patent number: 5446270
    Abstract: Composition comprising (a) susceptors having the capability of absorbing microwave energy, said susceptors comprising a particulate substrate substantially non-reflective of microwave energy and a coating capable of absorbing microwave energy, and (b) a matrix substantially non-reflective of microwave energy. Susceptors are typically particles having a thin-film coating thereon. The matrix typically comprises polymeric or ceramic materials that are stable at temperatures conventionally used in microwave cooking. The composition allows reuse of the susceptors, eliminates decline in heating rate, eliminates arcing, allows the heating rate to be controlled, allows overheating to be controlled, and allows formation of microwave heatable composite materials having very low metal content.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: August 29, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig S. Chamberlain, Glen Connell, Pierre H. LePere, Chris A. Minick, Charlotte M. Palmgren, William C. Tait, George F. Vesley, Patrick G. Zimmerman
  • Patent number: 5294763
    Abstract: Composition comprising (a) susceptors having the capability of absorbing microwave energy, and (b) a matrix substantially non-reflective of microwave energy. The susceptors comprise a particulate substrate having a thin-film coating thereon. The particulate substrate is substantially non-reflective of microwave energy and the coating is capable of absorbing microwave energy. The matrix typically comprises polymeric or ceramic materials that are stable at temperatures conventionally used in microwave cooking. The composition allows reuse of the susceptors, eliminates decline in heating rate, eliminates arcing, allows the heating rate to be controlled, allows overheating to be controlled, and allows formation of microwave heatable composite materials having very low metal content.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: March 15, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Craig S. Chamberlain, Glen Connell, Pierre H. LePere, Chris A. Minick, Charlotte M. Palmgren, William C. Tait, George F. Vesley, Patrick G. Zimmerman