Patents by Inventor Darshan JAYANNA

Darshan JAYANNA 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).

  • Method for the preparation of (polybutylene-co-adipate terephthalate) through the in situ phosphorus containing titanium based catalyst
    Patent number: 9487621
    Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: November 8, 2016
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Husnu Alp Alidedeoglu, Hareesh Shamroa Deshpande, Belinda Duckworth, Tukaram Gunale, Darshan Jayanna, Ganesh Kannan
  • Manufacture of dihydroxy aromatic compounds by alcoholysis of flame retardant-containing polycarbonate compositions
    Patent number: 9428627
    Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: August 30, 2016
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Philip Wesley Bell, Vic Ignacio Fernandez, Venkata Ramanarayanan Ganapathy Bhotla, Tukaram Gunale, Alexander Stanislaus, Darshan Jayanna
  • MANUFACTURE OF DIHYDROXY AROMATIC COMPOUNDS BY ALCOHOLYSIS OF FLAME RETARDANT-CONTAINING POLYCARBONATE COMPOSITIONS
    Publication number: 20150291763
    Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate.
    Type: Application
    Filed: December 11, 2013
    Publication date: October 15, 2015
    Inventors: Philip Wesley Bell, Vic Ignacio Fernandez, Venkata Ramanarayanan Ganapathy Bhotla, Tukaram Gunale, Darshan Jayanna
  • METHOD FOR THE PREPARATION OF (POLYBUTYLENE-CO-ADIPATE TEREPHTHALATE) THROUGH THE IN SITU PHOSPHORUS CONTAINING TITANIUM BASED CATALYST
    Publication number: 20150073117
    Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.
    Type: Application
    Filed: November 11, 2014
    Publication date: March 12, 2015
    Inventors: Husnu Alp ALIDEDEOGLU, Hareesh Shamroa DESHPANDE, Belinda DUCKWORTH, Tukaram GUNALE, Darshan JAYANNA, Ganesh KANNAN
  • Method for the preparation of (polybutylene-co-adipate terephthalate) through the in situ phosphorus containing titanium based catalyst
    Patent number: 8946345
    Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: February 3, 2015
    Assignee: Saudi Basic Industries Corporation
    Inventors: Husnu Alp Alidedeoglu, Hareesh Shamroa Deshpande, Belinda Duckworth, Tukaram Gunale, Darshan Jayanna, Ganesh Kannan
  • Manufacture of dihydroxy aromatic compounds by alcoholysis of polycarbonate-containing compositions
    Patent number: 8680227
    Abstract: A method to produce a purified dihydroxy aromatic compound from a polycarbonate-containing composition is provided. The method includes depolymerizing the polycarbonate by alcoholysis using a titanium-based catalyst producing a dihydroxy aromatic compound and a dialkyl carbonate, recovering the dihydroxy aromatic compound as a crude dihydroxy aromatic compound; and contacting the recovered crude dihydroxyl aromatic compound with an acid in the presence of a solvent at an elevated temperature. Alternatively, the method comprises dissolving the recovered crude dihydroxyl aromatic compound in a solvent; contacting the dissolved crude dihydroxy aromatic compound with a base; and neutralizing the combination of the dissolved crude dihydroxy aromatic compound and the base with an acid.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 25, 2014
    Assignee: Saudi Basic Industries Corporation
    Inventors: Philip Wesley Bell, Alexander Stanislaus, Venkata Ramanarayana Ganapathy Bhotla, Tukaram Gunale, Darshan Jayanna
  • Method for alcoholysis of acrylonitrile-butadiene-styrene-containing polycarbonate compositions
    Patent number: 8680226
    Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and acrylonitrile-butadiene-styrene. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar in a reactor for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate; removing the dihydroxy aromatic compound and the dialkyl carbonate from the reactor, the acrylonitrile-butadiene-styrene remaining as a coating on the surfaces of the reactor; adding a solvent to the reactor; and heating the solvent to remove the acrylonitrile-butadiene-styrene from the surfaces of the reactor.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 25, 2014
    Assignee: Saudi Basic Industries Corporation
    Inventors: Philip Wesley Bell, Alexander Stanislaus, Venkata Ramanarayanan Ganapathy Bhotla, Tukaram Gunale, Darshan Jayanna
  • METHOD FOR THE PREPARATION OF (POLYBUTYLENE-CO-ADIPATE TEREPHTHALATE) THROUGH THE IN SITU PHOSPHORUS CONTAINING TITANIUM BASED CATALYST
    Publication number: 20130079458
    Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.
    Type: Application
    Filed: March 29, 2012
    Publication date: March 28, 2013
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Husnu Alp ALIDEDEOGLU, Hareesh Shamroa DESHPANDE, Belinda DUCKWORTH, Tukaram GUNALE, Darshan JAYANNA, Ganesh KANNAN
  • METHOD FOR THE PREPARATION OF (POLYBUTYLENE-CO-ADIPATE TEREPHTHALATE) THROUGH THE IN SITU PHOSPHORUS CONTAINING TITANIUM BASED CATALYST
    Publication number: 20130053461
    Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.
    Type: Application
    Filed: August 30, 2011
    Publication date: February 28, 2013
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Husnu Alp ALIDEDEOGLU, Hareesh Shamroa DESHPANDE, Belinda DUCKWORTH, Tukaram GUNALE, Darshan JAYANNA, Ganesh KANNAN