Patents Assigned to Research Institute For Applied Sciences
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Patent number: 7938993Abstract: 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: GrantFiled: November 6, 2008Date of Patent: May 10, 2011Assignee: Birla Research Institute for Applied SciencesInventors: Koutu Brij Bhushan, Chand Suresh Salgiya
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Patent number: 7776180Abstract: Provided is a process for the preparation of flame retardant cellulosic product including the steps of adding a soluble salt of silica to viscose, followed by blending and extruding the blended viscose into a spin bath, regenerating the viscose and subjecting the regenerated viscose to a step of glow proofing with polyaluminium compounds to obtain the flame retardant cellulosic product.Type: GrantFiled: July 16, 2009Date of Patent: August 17, 2010Assignee: Birla Research Institute for Applied SciencesInventors: Aditya Narayan Shrivastava, Brij Bhushan Koutu, Rajeev Kumar Sharma, Daya Ram Chaurasia
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Patent number: 7651590Abstract: A flame retardant and glow resistant zinc free cellulose product containing silica, modified with polyaluminium ions. In the preparation of product the cellulose solution (viscose) and sodium silicate are blended and regenerated to obtain a polymeric silica in the cellulose structure which is further modified with polyaluminium ions to attach aluminium sites on silica molecules to make the product glow resistant and impart wash fastness as well.Type: GrantFiled: April 25, 2006Date of Patent: January 26, 2010Assignee: Birla Research Institute for Applied SciencesInventors: Aditya Narayan Shrivastava, Brij Bhushan Koutu, Rajeev Kumar Sharma, Daya Ram Chaurasia
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Publication number: 20090127750Abstract: 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: ApplicationFiled: November 6, 2008Publication date: May 21, 2009Applicant: BIRLA RESEARCH INSTITUTE FOR APPLIED SCIENCEInventors: Koutu Brij Bhushan, Salgiya Suresh Chand
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Patent number: 7459015Abstract: 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: GrantFiled: April 16, 2004Date of Patent: December 2, 2008Assignee: Birla Research Institute for Applied SciencesInventors: Koutu Brij Bhushan, Salgiya Suresh Chand
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Publication number: 20070205402Abstract: A flame retardant and glow resistant zinc free cellulose product containing silica, modified with polyaluminium ions. In the preparation of product the cellulose solution (viscose) and sodium silicate are blended and regenerated to obtain a polymeric silica in the cellulose structure which is further modified with polyaluminium ions to attach aluminium sites on silica molecules to make the product glow resistant and impart wash fastness as well.Type: ApplicationFiled: April 25, 2006Publication date: September 6, 2007Applicant: BIRLA RESEARCH INSTITUTE FOR APPLIED SCIENCESInventors: Aditya Shrivastava, Brij Koutu, Rajeev Sharma, Daya Chaurasia
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Publication number: 20070009661Abstract: An aluminum material having, on the surface thereof, an AlN region which has enhanced film thickness, is uniform within the region and exhibits a high adhesion to a base material; and a method for producing the aluminum material, which comprises a step of providing an aluminum material comprising CuAl2, and a step of subjecting said aluminum material to plasma nitriding, to thereby form the aluminum nitride (AlN) region on the surface of the aluminum material.Type: ApplicationFiled: January 26, 2004Publication date: January 11, 2007Applicant: RESEARCH INSTITUTE FOR APPLIED SCIENCESInventors: Tatsuhiko Aizawa, Hideyuki Kuwahara
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Patent number: 5363019Abstract: A discharge tube including a tubular vessel which is filled with gases, and including a first gas and second gas, the first and second gases being different in excitation level and luminous color from each other. A first electrode unit axially applies an electric field to the vessel to generate a positive column in the vessel. A second electrode unit applies an electric field to the vessel to generate a negative glow in an area, the area extending substantially along a wall surface of the vessel and confronting the positive column generated by the electric field applied by the first electrode.Type: GrantFiled: September 29, 1992Date of Patent: November 8, 1994Assignee: Research Institute For Applied SciencesInventors: Ryohei Itatani, Masatoshi Ryoko, Tatsushi Fujino