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: 7057816Abstract: 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: GrantFiled: January 6, 2006Date of Patent: June 6, 2006Assignee: 3M Innovative Properties CompanyInventors: 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: 20060114563Abstract: 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: ApplicationFiled: January 6, 2006Publication date: June 1, 2006Inventors: Richard Allen, Arthur Kotz, Lockwood Carlson, Timothy Nevitt, Andrew Ouderkirk, Carl Stover, Michael Weber, Biswaroop Majumdar
-
Patent number: 6999233Abstract: 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: GrantFiled: December 2, 2004Date of Patent: February 14, 2006Assignee: 3M Innovative Properties CompanyInventors: 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: 6987612Abstract: 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: GrantFiled: July 7, 2003Date of Patent: January 17, 2006Assignee: 3M Innovative Properties CompanyInventors: 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: 20050182170Abstract: A thermoplastic composition comprises a poly(arylene ether), a polyamide, a metal stearate and a polyolefin comprising functional groups reactive with the polyamide.Type: ApplicationFiled: February 13, 2004Publication date: August 18, 2005Inventors: Biswaroop Majumdar, Kristopher Rexius, Sai-Pei Ting
-
Publication number: 20050078371Abstract: 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: ApplicationFiled: December 2, 2004Publication date: April 14, 2005Inventors: Richard Allen, Arthur Kotz, Lockwood Carlson, Timothy Nevitt, Andrew Ouderkirk, Carl Stover, Michael Weber, Biswaroop Majumdar
-
Patent number: 6760157Abstract: 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: GrantFiled: July 25, 2000Date of Patent: July 6, 2004Assignee: 3M Innovative Properties CompanyInventors: 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: 20040012855Abstract: 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: ApplicationFiled: July 7, 2003Publication date: January 22, 2004Applicant: 3M Innovative Properties CompanyInventors: 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: 6590705Abstract: 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: GrantFiled: February 18, 1997Date of Patent: July 8, 2003Assignee: 3M Innovative Properties CompanyInventors: 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: 6297906Abstract: 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: GrantFiled: February 28, 1997Date of Patent: October 2, 2001Assignee: 3M Innovative Properties CompanyInventors: 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: 6221283Abstract: 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: GrantFiled: November 16, 1999Date of Patent: April 24, 2001Assignee: General Electric CompanyInventors: 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: 6180716Abstract: 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: GrantFiled: March 18, 1998Date of Patent: January 30, 2001Assignee: General Electric CompanyInventor: Biswaroop Majumdar
-
Patent number: 6141149Abstract: 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: GrantFiled: January 19, 2000Date of Patent: October 31, 2000Assignee: 3M Innovative Properties CompanyInventors: 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: 6111696Abstract: 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: GrantFiled: February 28, 1997Date of Patent: August 29, 2000Assignee: 3M Innovative Properties CompanyInventors: 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: 6057961Abstract: 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: GrantFiled: February 28, 1997Date of Patent: May 2, 2000Assignee: 3M Innovative Properties CompanyInventors: 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: 6031665Abstract: 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: GrantFiled: August 24, 1998Date of Patent: February 29, 2000Assignee: 3M Innovative Properties CompanyInventors: 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: 6005713Abstract: 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: GrantFiled: April 30, 1999Date of Patent: December 21, 1999Assignee: 3M Innovative Properties CompanyInventors: 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: 5991077Abstract: 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: GrantFiled: August 21, 1998Date of Patent: November 23, 1999Assignee: 3M Innovative Properties CompanyInventors: 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: 5867316Abstract: 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: GrantFiled: February 29, 1996Date of Patent: February 2, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: 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: 5825543Abstract: 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: GrantFiled: February 29, 1996Date of Patent: October 20, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Andrew J. Ouderkirk, Lockwood W. Carlson, Arthur L. Kotz, Timothy J. Nevitt, Carl A. Stover, Michael F. Weber, Richard C. Allen, Biswaroop Majumdar