Patents by Inventor Braja K. Mandal

Braja K. Mandal 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: 6746794
    Abstract: The present invention provides for a battery having an anode, a cathode, and a flame-retarding electrolyte with a conductivity greater than about 10−3 S/cm at ambient temperature and which includes a compound that chemically interferes with flame propagation.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: June 8, 2004
    Assignee: Tech Drive, Inc
    Inventors: Braja K. Mandal, Robert Filler
  • Publication number: 20030003358
    Abstract: The present invention provides for a battery having an anode, a cathode, and a flame-retarding electrolyte with a conductivity greater than about 10−3 S/cm at ambient temperature and which includes a compound that chemically interferes with flame propagation.
    Type: Application
    Filed: June 12, 2001
    Publication date: January 2, 2003
    Inventors: Braja K. Mandal, Robert Filler
  • Patent number: 6294593
    Abstract: Crosslinkable polymers which can exhibit second order nonlinear optical properties and methods of forming and crosslinking such polymers are disclosed. The crosslinkable polymers are combined with a crosslinking agent. Optionally, the crosslinking agent can exhibit second order nonlinear optical properties. In one embodiment, the crosslinking agent is thermally reactive. Alternatively the crosslinking agent is photoreactive. The combined polymer and crosslinking agent are exposed to an electric field which is sufficient to cause a component of the polymer which can exhibit second order nonlinear optical properties to be poled. The polymer is then crosslinked by the crosslinking agent. The crosslinking agent can be a guest compound that is-covalently bound to the polymer, which operates as a host compound.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: September 25, 2001
    Assignee: University of Massachusetts Lowell
    Inventors: Ru Jong Jeng, Jayant Kumar, Braja K. Mandal, Sukant Kishore Tripathy
  • Patent number: 5484821
    Abstract: A novel photocrosslinkable polymeric system has been developed for processing into films having stable second-order nonlinear optical properties. In the present system, polymers bearing photo-crosslinkable chromophores, such as polyvinylcinnamate and are reacted with appropriately designed nonlinear optical molecules with the cinnamate or other photocrosslinkable functionalities for photocrosslinking at one, two or more points. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity and large electro-optic coefficients.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: January 16, 1996
    Assignee: University of Lowell
    Inventors: Braja K. Mandal, Sukant K. Tripathy, Jan-Chan Huang, Jayant Kumar
  • Patent number: 5290824
    Abstract: A novel photocrosslinkable polymeric system has been developed for processing into films having stable second-order nonlinear optical properties. In the present system, polymers bearing photo-crosslinkable chromophores, such as polyvinylcinnamate and are reacted with appropriately designed nonlinear optical molecules with the cinnamate or other photocrosslinkable functionalities for photocrosslinking at one, two or more points. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity and large electro-optic coefficients.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: March 1, 1994
    Assignee: University of Lowell
    Inventors: Braja K. Mandal, Sukant K. Tripathy, Jan-Chuan Huang, Jayant Kumar
  • Patent number: 5223356
    Abstract: A novel photocrosslinkable polymeric system has been developed for processing into films having stable second-order nonlinear optical properties. In the present system, polymers bearing photo-crosslinkable chromophores, such as polyvinylcinnamate and are reacted with appropriately designed nonlinear optical molecules with the cinnamate or other photocrosslinkable functionalities for photocrosslinking at one, two or more points. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity and large electro-optic coefficients.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: June 29, 1993
    Assignee: University of Lowell
    Inventors: Jayant Kumar, Sukant K. Tripathy, Braja K. Mandal, Jan-Chan Huang
  • Patent number: 5143828
    Abstract: A method for synthesizing enzyme-catalyzed polymers using the Langmuir-Blodgett technique. In one embodiment, the process comprises spreading one or more enzyme-polymerizable monomers on a water-miscible solvent. The monomers are sufficiently surface active that they align themselves on the air-solvent interface. Next, pressure is applied to the interface to form a monolayer made up of the monomers. An enzyme is then introduced into the solvent, causing polymerization of the monomers in the monolayer. The polymeric monolayers produced by the present method are easier to process and have reduced cross-linking and branching as compared to similar polymers produced in bulk by enzyme-catalyzed reactions.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: September 1, 1992
    Assignees: The United States of America as represented by the Secretary of the Army, University of Massachusetts Lowell
    Inventors: Joseph A. Akkara, David L. Kaplan, Lynne A. Samuelson, Braja K. Mandal, Sukant K. Tripathy, Ferdinando F. Bruno, Kenneth A. Marx
  • Patent number: 5112881
    Abstract: A novel photocrosslinkable polymeric system has been developed for processing into films having stable second-order nonlinear optical properties. In the present system, polymers bearing photocrosslinkable chromophores, such as polyvinylcinnamate and are reacted with appropriately designed nonlinear optical molecules with the cinnamate or other photocrosslinkable functionalities for photocrosslinking at one, two or more points. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity and large electro-optic coefficients.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: May 12, 1992
    Assignee: University of Lowell
    Inventors: Braja K. Mandal, Sukant K. Tripathy, Jan-Chan Huang, Jayant Kumar