Patents by Inventor Ashok Misra

Ashok Misra 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).

  • Internally plasticized polyvinyl chloride and a process for preparation thereof
    Patent number: 11807748
    Abstract: The present disclosure relates to an internally plasticized polyvinyl chloride resin and a process for preparation thereof. The internally plasticized polyvinyl chloride resin comprises a polyvinyl chloride (PVC) resin covalently bonded to at least one plasticizer. The process is simple and economical and provides internally plasticized PVC with enhanced flexibility, and improved characteristics than conventional PVC resin.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: November 7, 2023
    Assignee: RELIANCE INDUSTRIES LIMITED
    Inventors: Virendra Kumar Gupta, Saurabh Kumar Tiwari, Ashok Misra, Haribhau Shantaram Kumbhar
  • INTERNALLY PLASTICIZED POLYVINYL CHLORIDE AND A PROCESS FOR PREPARATION THEREOF
    Publication number: 20220098396
    Abstract: The present disclosure relates to an internally plasticized polyvinyl chloride resin and a process for preparation thereof. The internally plasticized polyvinyl chloride resin comprises a polyvinyl chloride (PVC) resin covalently bonded to at least one plasticizer. The process is simple and economical and provides internally plasticized PVC with enhanced flexibility, and improved characteristics than conventional PVC resin.
    Type: Application
    Filed: January 24, 2020
    Publication date: March 31, 2022
    Applicant: RELIANCE INDUSTRIES LIMITED
    Inventors: Virendra Kumar GUPTA, Saurabh Kumar TIWARI, Ashok MISRA, Haribhau Shantaram KUMBHAR
  • Ionomeric polyvinyl butyral
    Patent number: 5030688
    Abstract: Polyvinyl butyral resin containing a modification-promoting amount of up to about 15 mole % ionomeric groups which are preferably the metal sulfonate salt of an aldehyde chemically combined with oxygen atoms of adjacent precursor vinyl alcohol groups. Such resin is prepared from a precursor PVOH containing chemically bound ionic acid groups.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: July 9, 1991
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta
  • Polyvinyl butyral sheet
    Patent number: 4999253
    Abstract: Plasticized polyvinyl butyral sheet containing a modification-producing amount of ionomeric groups which are preferably the metal sulfonate salt of an aldehyde chemically combined with oxygen atoms of adjacent precursor vinyl alcohol groups.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: March 12, 1991
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta
  • Reducing blocking and increasing flow of plasticized polyvinyl butyral sheet
    Patent number: 4999078
    Abstract: A process for increasing both resistance to blocking and flow during laminating of plasticized polyvinyl butyral sheet which comprises incorporating into the formulation of the sheet a block-reducing and flow-promoting amount, preferably up to about 10 mole %, of ionomeric groups chemically bound to oxygen atoms of adjacent precursor vinyl alcohol groups.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: March 12, 1991
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta
  • Polyvinyl butyral polyblend
    Patent number: 4968744
    Abstract: A polyblend comprising first and second polyvinyl butyral components admixed with plasticizer, one of the components present in minor amount (preferably 10 to 30 weight %) containing chemically bound ionomeric groups which are preferably the metal salt of an aldehyde.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: November 6, 1990
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta
  • Method of producing ionomeric polyvinyl butyral
    Patent number: 4968745
    Abstract: A method of producing ionomeric polyvinyl butyral by the steps of (a) condensing polyvinyl alcohol with an aldehyde containing an acid group in the presence of a catalyst; (b) acetalizing the reaction product of step (a) in situ with butyraldehyde to form polyvinyl butyral and (c) neutralizing the reaction product of step (b) to form ionomeric polyvinyl butyral.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: November 6, 1990
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta
  • Process for preparing polyinyl butyral sheet
    Patent number: 4968743
    Abstract: In a process for preparation of polyvinyl butyral sheet by blending polyvinyl butyral with plasticizer and extruding the blend to form the sheet, the step in combination therewith of including in the blend a modification-promoting amount, preferably up to about 10 mole % based on polyvinyl butyral, of ionomeric groups chemically bound to polyvinyl butyral forming the sheet.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: November 6, 1990
    Assignee: Monsanto Company
    Inventors: Ashok Misra, Donald J. David, Arijit M. DasGupta