Patents by Inventor Koutu Brij Bhushan

Koutu Brij Bhushan 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).

  • Process for making cellulose fibre, filaments or films
    Patent number: 7938993
    Abstract: An improved process for the preparation of a cellulose solution for spinning of fibers, filaments or films therefrom comprising the steps of: a) activating cellulose in a mixture containing said cellulose, tertiary amine oxide solvent and water for a period sufficient to allow a swelling of the cellulose by introduction therein of water present in said mixtures, the temperature of said activation step and concentration of solvent being such that the solvent is not converted into its monohydrate state during the step of activation; b) the cellulose mixture being subjected to the steps of dissolution of cellulose in the solvent by heating for removal of water so as to convert the solvent into at least its monohydrate form so as to cause a dissolution.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: May 10, 2011
    Assignee: Birla Research Institute for Applied Sciences
    Inventors: Koutu Brij Bhushan, Chand Suresh Salgiya
  • Process for making cellulose fibre, filaments or films
    Publication number: 20090127750
    Abstract: An improved process for the preparation of a cellulose solution for spinning of fibres, filaments or films therefrom comprising the steps of: a) activating cellulose in a mixture containing said cellulose, tertiary amine oxide solvent and water for a period sufficient to allow a swelling of the cellulose by introduction therein of water present in said mixtures, the temperature of said activation step and concentration of solvent being such that the solvent is not converted into its monohydrate state during the step of activation; b) the cellulose mixture being subjected to the steps of dissolution of cellulose in the solvent by heating for removal of water so as to convert the solvent into at least its monohydrate form so as to cause a dissolution.
    Type: Application
    Filed: November 6, 2008
    Publication date: May 21, 2009
    Applicant: BIRLA RESEARCH INSTITUTE FOR APPLIED SCIENCE
    Inventors: Koutu Brij Bhushan, Salgiya Suresh Chand
  • Process for the preparation of a cellulose solution for spinning of fibres, filaments or films therefrom
    Patent number: 7459015
    Abstract: An improved process for the preparation of a cellulose solution for spinning of fibers, filaments or films therefrom comprising the steps of: a) activating cellulose in a mixture containing said cellulose, tertiary amine oxide solvent and, water for a period sufficient to allow a swelling of the cellulose by introduction therein of water present in said mixtures, the temperature of said activation step and concentration of solvent being such that the solvent is not converted into its monohydrate state during the step of activation; b) the cellulose, using a activator such as a glycol or a glyme, mixture being subjected to the steps of dissolution of cellulose in the solvent by heating for removal of water so as to convert the solvent into at least its monohydrate form so as to cause a dissolution.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: December 2, 2008
    Assignee: Birla Research Institute for Applied Sciences
    Inventors: Koutu Brij Bhushan, Salgiya Suresh Chand