Patents by Inventor Siva Kumar Sreeramagiri

Siva Kumar Sreeramagiri 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 to make low color polyetherimide by halo-displacement and low color polyetherimide
    Patent number: 11505652
    Abstract: A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: November 22, 2022
    Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
    Inventors: Thomas Guggenheim, Jose Roman Galdamez, Javier Nieves Remacha, Juan J. Rodriguez Ordonez, Maria Patricia Forcen Jimenez, Hareesh Shamrao Deshpande, Surya Prakasa Rao Daliparthi, Sunil S. Dhumal, Sivakumar Periyasamy, Srinivas Mahesh Kumar, Siva Kumar Sreeramagiri, Bernabe Quevedo Sanchez
  • PROCESS TO MAKE LOW COLOR POLYETHERIMIDE BY HALO-DISPLACEMENT AND LOW COLOR POLYETHERIMIDE
    Publication number: 20200079909
    Abstract: A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.
    Type: Application
    Filed: November 18, 2019
    Publication date: March 12, 2020
    Inventors: Thomas Guggenheim, Jose Roman Galdamez, Javier Nieves Remacha, Juan J. Rodriguez Ordonez, Maria Patricia Forcen Jimenez, Hareesh Shamrao Deshpande, Surya Prakasa Rao Daliparthi, Sunil S. Dhumal, Sivakumar Periyasamy, Srinivas Mahesh Kumar, Siva Kumar Sreeramagiri, Bernabe Quevedo Sanchez
  • Polyetherimide with improved color, and methods of manufacture thereof
    Patent number: 10584210
    Abstract: A method of preparing a polyetherimide and an improved polyetherimide are disclosed. Low color polyetherimides are disclosed along with process improvements which produce the reduced color of the final product polymers.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: March 10, 2020
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Thomas Guggenheim, Juan Rodriguez Ordonez, Javier Nieves Remacha, Jose Roman Galdamez Pena, Hareesh Shamrao Deshpande, Sunil S. Dhumal, Surya Prakasa Rao Daliparthi, Srinivas Mahesh Kumar, Sivakumar P., Siva Kumar Sreeramagiri, Carmen Rocío Misiego Arpa, Carlos Sanjuan Fernandez, Bernabe Quevedo Sanchez
  • Process to make low color polyetherimide by halo-displacement and low color polyetherimide
    Patent number: 10526449
    Abstract: A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: January 7, 2020
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Thomas Guggenheim, Jose Roman Galdamez, Javier Nieves Remacha, Juan J. Rodriguez Ordonez, Maria Patricia Forcen Jimenez, Hareesh Shamrao Deshpande, Surya Prakasa Rao Daliparthi, Sunil S. Dhumal, Sivakumar Periyasamy, Srinivas Mahesh Kumar, Siva Kumar Sreeramagiri, Bernabe Quevedo Sanchez
  • Blends of polyetherimide sulfone and poly(arylene sulfide)
    Patent number: 9909006
    Abstract: Disclosed herein is a composition comprising a compatible blend of i) 60 to 85 weight percent of a linear poly(arylene sulfide), ii) 15 to 40 weight percent of a polyetherimide sulfone; and iii) 1 to 3 weight percent of a novolac resin having an average of 2 or more epoxy groups per molecule. Weight percent is based on the total weight of the composition. An article made from the composition has a tensile strength greater than or equal to 70 megaPascals (MPa), as determined by ASTM D638, an impact strength of greater than or equal to 3 kiloJoules per square meter (kJ/m2), as determined by ASTM D256, and an elongation at break greater than or equal to 3 % as determined by ASTM D638. Methods of making the composition are also disclosed.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: March 6, 2018
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Hariharan Ramalingam, Gurulingamurthy M. Haralur, Siva Kumar Sreeramagiri, Gautam Chatterjee, Kapil Chandrakant Sheth, Sanjay Braj Mishra
  • PROCESS TO MAKE LOW COLOR POLYETHERIMIDE BY HALO-DISPLACEMENT AND LOW COLOR POLYETHERIMIDE
    Publication number: 20180044474
    Abstract: A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.
    Type: Application
    Filed: February 26, 2016
    Publication date: February 15, 2018
    Inventors: Thomas Guggenheim, Jose Roman Galdamez, Javier Nieves Remacha, Juan J. Rodriguez Ordonez, Maria Patricia Forcen Jimenez, Hareesh Shamrao Deshpande, Surya Prakasa Rao Daliparthi, Sunil S. Dhumal, Sivakumar Periyasamy, Srinivas Mahesh Kumar, Siva Kumar Sreeramagiri, Bernabe Quevedo Sanchez
  • POLYETHERIMIDE WITH IMPROVED COLOR, AND METHODS OF MANUFACTURE THEREOF
    Publication number: 20180037699
    Abstract: A method of preparing a polyetherimide and an improved polyetherimide are disclosed. Low color polyetherimides are disclosed along with process improvements which produce the reduced color of the final product polymers.
    Type: Application
    Filed: February 26, 2016
    Publication date: February 8, 2018
    Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Thomas Guggenheim, Juan Rodriguez Ordonez, Javier Nieves Remacha, Jose Roman Galdamez Pena, Hareesh Shamrao Deshpande, Sunil S. Dhumal, Surya Prakasa Rao Daliparthi, Srinivas Mahesh Kumar, Sivakumar P., Siva Kumar Sreeramagiri, Carmen Rocío Misiego Arpa, Carlos Sanjuan Fernandez, Bernabe Quevedo Sanchez
  • METHODS OF MANUFACTURE OF BIS(PHTHALIMIDE)S AND POLYETHERIMIDES, AND BIS(PHTHALIMIDE)S, AND POLYETHERIMIDES FORMED THEREFROM
    Publication number: 20140099510
    Abstract: A method of manufacture of a bis(phthalimide) composition includes reacting, in the presence of a solvent and a catalytically active amount of an imidization catalyst selected from quaternary ammonium salts, quaternary phosphonium salts, and combinations thereof, a substituted phthalic anhydride with an organic diamine, wherein conversion to the bis(phthalimide) is 99% complete in less than 6 hours.
    Type: Application
    Filed: October 4, 2012
    Publication date: April 10, 2014
    Inventors: Hendrich Chiong, Surya Prakasha Rao Daliparthi, Hareesh Shamrao Deshpande, Thomas Link Guggenheim, Farid Fouad Khouri, Mahesh Srinivas Kumar, Miguel Angel Navarro De Castro, Roy Ray Odle, Sivakumar P, Dhumal Sunil S, Brennan Alexander Smith, Siva Kumar Sreeramagiri
  • Blends of polysiloxane/polyimide block copolymer and poly(arylene sulfide)
    Patent number: 8618218
    Abstract: Disclosed herein is a composition comprising a compatible blend of i) 24 to less than 84.5 weight percent of a linear poly(arylene sulfide), ii) 14 to 75 weight percent of a polysiloxane/polyimide block copolymer; and iii) 0.1 to less than 2.5 weight percent of a polymeric compatibilizer having 2 or more epoxy groups per molecule. Weight percent is based on the total weight of the composition. An article made from the composition has tensile elongation greater than or equal to 60% as determined by ASTM D638 and a Notched Izod impact strength greater than 50 joules per meter as determined by ASTM D256 at room temperature.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: December 31, 2013
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Hariharan Ramalingam, Yashpal Bhandari, Gautam Chatterjee, Siva Kumar Sreeramagiri, Sanjay Braj Mishra
  • BLENDS OF POLYETHERIMIDE SULFONE AND POLY(ARYLENE SULFIDE) AND METHODS OF MAKING
    Publication number: 20130079459
    Abstract: A composition comprising a compatible blend of i) 15 to 45 wt % of a linear poly (arylene sulfide), ii) 50 to 85 wt % of a polyetherimide sulfone; and iii) 1 to 3 wt % of a novolac resin having an average of 2 or more epoxy groups per molecule. The composition can comprise a polyetherimide. An article made from the composition has a property selected from the group of (i) tensile strength greater than or equal to 90 megaPascals (MPa), as determined by ASTM D638, (ii) an impact strength of greater than or equal to 3 kiloJoules per square meter (kJ/m2), as determined by ASTM D256, (iii) an elongation at break greater than or equal to 3% as determined by ASTM D638, (iv) a heat distortion temperature greater than or equal to 160° C. as determined by ASTM D648, and combinations of two or more of the foregoing properties.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Hariharan Ramalingam, Gurulingamurthy M. Haralur, Siva Kumar Sreeramagiri, Gautam Chatterjee, Kapil Chandrakant Sheth, Sanjay Braj Mishra
  • BLENDS OF POLYETHERIMIDE SULFONE AND POLY(ARYLENE SULFIDE)
    Publication number: 20130079438
    Abstract: Disclosed herein is a composition comprising a compatible blend of i) 60 to 85 weight percent of a linear poly(arylene sulfide), ii) 15 to 40 weight percent of a polyetherimide sulfone; and iii) 1 to 3 weight percent of a novolac resin having an average of 2 or more epoxy groups per molecule. Weight percent is based on the total weight of the composition. An article made from the composition has a tensile strength greater than or equal to 70 megaPascals (MPa), as determined by ASTM D638, an impact strength of greater than or equal to 3 kiloJoules per square meter (kJ/m2), as determined by ASTM D256, and an elongation at break greater than or equal to 3% as determined by ASTM D638. Methods of making the composition are also disclosed.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Hariharan Ramalingam, Gurulingamurthy M. Haralur, Siva Kumar Sreeramagiri, Gautam Chatterjee, Kapil Chandrakant Sheth, Sanjay Braj Mishra
  • BLENDS OF POLYSILOXANE/POLYIMIDE BLOCK COPOLYMER AND POLY(ARYLENE SULFIDE)
    Publication number: 20130079474
    Abstract: Disclosed herein is a composition comprising a compatible blend of i) 24 to less than 84.5 weight percent of a linear poly(arylene sulfide), ii) 14 to 75 weight percent of a polysiloxane/polyimide block copolymer; and iii) 0.1 to less than 2.5 weight percent of a polymeric compatibilizer having 2 or more epoxy groups per molecule. Weight percent is based on the total weight of the composition. An article made from the composition has tensile elongation greater than or equal to 60% as determined by ASTM D638 and a Notched Izod impact strength greater than 50 joules per meter as determined by ASTM D256 at room temperature.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Hariharan Ramalingam, Yashpal Bhandari, Gautam Chatterjee, Siva Kumar Sreeramagiri, Sanjay Braj Mishra