Patents by Inventor Virendra Kumar Gupta

Virendra Kumar Gupta 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).

  • Publication number: 20160002372
    Abstract: In the present disclosure, a Ziegler-Natta catalyst composition for the polymerization of olefin monomers to produce polyolefin with controlled molecular weight distribution is provided wherein said controlled molecular weight distribution ranges from narrow to broad. The desired control over the molecular weight distribution of polyolefin is accomplished by using a Ziegler-Natta catalyst composition having enhanced self-extinguishing property. In the Zeigler-Natta catalyst composition of the present disclosure, in addition to a titanium and magnesium containing pro-catalyst component, a mixture of tri-alkyl aluminum compounds as a co-catalyst mixture is used. The particular combination of tri-alkyl aluminum compounds in a pre-determined weight proportion provides desirable control over the molecular weight distribution of polyolefin.
    Type: Application
    Filed: January 22, 2014
    Publication date: January 7, 2016
    Inventors: Priyanshu Bharatkumar VYAS, Harshad Ramdas PATIL, Virendra Kumar GUPTA
  • Patent number: 8962721
    Abstract: Described herein are novel acetal compounds capable as nucleating agents for polyolefins. The present invention relates to such compounds synthesized by reacting aromatic aldehydes with polyols and further, to the achievement of high crystallization temperatures in polypropylene compositions upon dispersal therein of formulations containing one or more of the said acetal compounds.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: February 24, 2015
    Assignee: Reliance Industries Limited
    Inventors: Gandham Satya Srinivasa Rao, S. Muthukumaru Pillai, Virendra Kumar Gupta
  • Patent number: 8785529
    Abstract: Described herein are novel metal salts capable as nucleating agents for polyolefins. The present invention relates to such salts synthesized by reacting potassium hydroxide with carboxylic acids and further, to the achievement of high crystallization temperatures in polypropylene compositions upon dispersal therein of formulations containing one or more of the said metal salts.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: July 22, 2014
    Assignee: Reliance Industries Limited
    Inventors: Gandham Satya Srinivasa Rao, S. Muthukumaru Pillai, Virendra Kumar Gupta
  • Publication number: 20130116366
    Abstract: Described herein are novel acetal compounds capable as nucleating agents for polyolefins. The present invention relates to such compounds synthesized by reacting aromatic aldehydes with polyols and further, to the achievement of high crystallization temperatures in polypropylene compositions upon dispersal therein of formulations containing one or more of the said acetal compounds.
    Type: Application
    Filed: January 14, 2011
    Publication date: May 9, 2013
    Applicant: RELIANCE INDUSTRIES LIMITED
    Inventors: Gandham Satya Srinivasa Rao, S. Muthukumaru Pillai, Virendra Kumar Gupta
  • Publication number: 20120289632
    Abstract: Described herein are novel metal salts capable as nucleating agents for polyolefins. The present invention relates to such salts synthesized by reacting potassium hydroxide with carboxylic acids and further, to the achievement of high crystallization temperatures in polypropylene compositions upon dispersal therein of formulations containing one or more of the said metal salts.
    Type: Application
    Filed: January 14, 2011
    Publication date: November 15, 2012
    Applicant: RELIANCE INDUSTRIES LIMITED
    Inventors: Gandham Satya Srinivasa Rao, S. Muthukumaru Pillai, Virendra Kumar Gupta
  • Patent number: 7265074
    Abstract: Single step process for the preparation of lower ?-alkene polymerisation heterogeneous solid catalyst, wherein the procatalyst is obtained by reacting organomagnesium precursor and titanium tetrahalide or titanium haloalkoxo species of the formula Ti(OR)m Xn, with a hydrocarbon or halohydrocarbon solvent and internal electron donor and optionally an acid halide under microwave irradiation of 300 to 1200 W. The mole ratio of the organomagnesium precursor to the titanium tetrachloride or titanium haloalko species is 1:6 to 1:20 and the mole ratios of the electron donor and acid halide to titanium is 0.3 to 1.5 and 0.02 to 0.2, respectively.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: September 4, 2007
    Assignee: Reliance Industries Limited
    Inventors: Sumit Bhaduri, Virendra Kumar Gupta, Krishna Sarma
  • Patent number: 6969747
    Abstract: An olefin polymerization titanium catalyst. It comprises a titanium compound and an organoaluminium compound cocatalyst supported on a soluble polysulfone comprising free reactive sulfone groups. The molar ratio of titanium of aluminum is 1–10:200 and the weight ratio of titanium to polysulfone is 0.01–0.1:0.3–2.5. The process for preparing the catalyst comprises preparing a supported titanium compound by contacting a solution of a polysulfone in a halogenated or polar solvent with a titanium compound or a solution thereof in a halogenated or polar solvent in an inert atmosphere at a temperature between 10° C. and the boiling point of the solvent such that the weight ratio of titanium to polysulfone is 0.01–0.1:0.3–2.5. The supported titanium compound is mixed with an organoaluminium cocatalyst such that the molar ratio of titanium to aluminum is 1–10:200.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: November 29, 2005
    Assignee: Reliance Industries Limited
    Inventors: Sumit Bhaduri, Virendra Kumar Gupta
  • Patent number: 6841633
    Abstract: A lower ?-alkene polymerization heterogeneous solid catalyst which comprises a hydrated magnesium chloride derived procatalyst, a cocatalyst comprising an organoaluminium compound and a selectivity control agent comprising an ester or ether. The procatalyst comprises a titanium tetrahalide supported on a magnesium chloride ester complex precursor. Magnesium chloride alcoholate is reacted with an activated carbonyl compound in the presence of a hydrocarbon and/or halohydrocarbon solvent to generate insitu an internal electron donor ester component of the precursor. The precursor is reacted with a titanium tetrahalide optionally in the presence of a hydrocarbon and/or halohydrocarbon solvent.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: January 11, 2005
    Assignee: Reliance Industries Limited
    Inventors: Sumit Bhaduri, Virendra Kumar Gupta