Patents by Inventor Biswaroop Majumdar

Biswaroop Majumdar 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: 7057816
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: June 6, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Arthur L. Kotz, Lockwood W. Carlson, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Biswaroop Majumdar
  • Publication number: 20060114563
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Application
    Filed: January 6, 2006
    Publication date: June 1, 2006
    Inventors: Richard Allen, Arthur Kotz, Lockwood Carlson, Timothy Nevitt, Andrew Ouderkirk, Carl Stover, Michael Weber, Biswaroop Majumdar
  • Patent number: 6999233
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: February 14, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Arthur L. Kotz, Lockwood W. Carlson, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Biswaroop Majumdar
  • Patent number: 6987612
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: January 17, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Arthur L. Kotz, Lockwood W. Carlson, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Biswaroop Majumdar
  • Publication number: 20050182170
    Abstract: A thermoplastic composition comprises a poly(arylene ether), a polyamide, a metal stearate and a polyolefin comprising functional groups reactive with the polyamide.
    Type: Application
    Filed: February 13, 2004
    Publication date: August 18, 2005
    Inventors: Biswaroop Majumdar, Kristopher Rexius, Sai-Pei Ting
  • Publication number: 20050078371
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Application
    Filed: December 2, 2004
    Publication date: April 14, 2005
    Inventors: Richard Allen, Arthur Kotz, Lockwood Carlson, Timothy Nevitt, Andrew Ouderkirk, Carl Stover, Michael Weber, Biswaroop Majumdar
  • Patent number: 6760157
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix in combination with light directing materials to enable control of light emitted from a lighting fixture or display. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film, and the light directing materials are chosen to control the direction of polarized light reflected from or transmitted by the optical film.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: July 6, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Lockwood W. Carlson, Andrew J. Ouderkirk, Michael F. Weber, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Biswaroop Majumdar
  • Publication number: 20040012855
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Application
    Filed: July 7, 2003
    Publication date: January 22, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Arthur L. Kotz, Lockwood W. Carlson, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Biswaroop Majumdar
  • Patent number: 6590705
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: July 8, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Arthur L. Kotz, Lockwood W. Carlson, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Biswaroop Majumdar
  • Patent number: 6297906
    Abstract: An optical film is provided which comprises an antireflective layer and a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 2, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Timothy J. Nevitt, Andrew J. Ouderkirk, Arthur L. Kotz, Lockwood W. Carlson, Michael F. Weber, Carl A. Stover, Biswaroop Majumdar
  • Patent number: 6221283
    Abstract: The invention relates to a method of making a conductive thermoplastic composition containing at least one dispersed phase polymer with a continuous phase polymer and at least one conductivity imparting agent wherein the bulk resistivity of the composition is at least partially determined by the particle size of the dispersed phase within the continuous phase. The thermoplastic composition preferably comprises a compatibilized blend of at least one polyphenylene ether resin, at least one polyamide resin, and at least one conductivity imparting agent, and optionally, one or more of impact modifiers, stabilizers, antioxidants, lubricants, and fillers.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: April 24, 2001
    Assignee: General Electric Company
    Inventors: Raja Dharmarajan, Robert Hossan, Biswaroop Majumdar, Alan Oshinski, Christiaan H. Koevoets, Jan P H Keulen, Antoinette C. van Bennekom, Johannes Matthijssen, Ilse Schlosser
  • Patent number: 6180716
    Abstract: The invention relates to a method of enhancing the surface appearance of articles made from an impact modified composition of a compatibilized polyphenylene ether-polyamide resin blend. The impact modified composition contains from about 5% to less than 50% by weight polyphenylene ether resin with from about 0.7% to about 1.1% by weight of a non-polymeric aliphatic polycarboxylic acid or derivative thereof and from about 5% to about 15% by weight of an elastomeric block copolymer, and from about 45% to about 90% of a polyamide resin, wherein the polyamide resin has an amine endgroup to acid endgroup ratio of at least about 1.0, and wherein all weights are based on the total weight of the composition.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: January 30, 2001
    Assignee: General Electric Company
    Inventor: Biswaroop Majumdar
  • Patent number: 6141149
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: October 31, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar
  • Patent number: 6111696
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix in combination with light directing materials to enable control of light emitted from a lighting fixture or display. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film, and the light directing materials are chosen to control the direction of polarized light reflected from or transmitted by the optical film.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: August 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Lockwood W. Carlson, Andrew J. Ouderkirk, Michael F. Weber, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Biswaroop Majumdar
  • Patent number: 6057961
    Abstract: An optical film is provided which exhibits increased gain at nonnormal angles of incidence and which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: May 2, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Richard C. Allen, Lockwood W. Carlson, Andrew J. Ouderkirk, Michael F. Weber, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Biswaroop Majumdar
  • Patent number: 6031665
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: February 29, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar
  • Patent number: 6005713
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: December 21, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar
  • Patent number: 5991077
    Abstract: An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: November 23, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar
  • Patent number: 5867316
    Abstract: An optical film is provided which includes a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: February 2, 1999
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Andrew J. Ouderkirk, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar
  • Patent number: 5825543
    Abstract: An optical film with a disperse phase of polymeric particles disposed within a continuous birefringent matrix. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: October 20, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Andrew J. Ouderkirk, Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar