Patents by Inventor Hariharan Ramalingam

Hariharan Ramalingam 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).

  • Patent number: 10457809
    Abstract: A poly(siloxane-etherimide) composition comprising, based on the total weight of the composition, 70 to 90 wt % of a poly(siloxane-etherimide); and an additive comprising a polyester, a filler, or a combination thereof; wherein the filler comprises talc, calcium carbonate, or a combination comprising at least one of the foregoing; and wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: October 29, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Kapil Chandrakant Sheth, Hariharan Ramalingam
  • Publication number: 20190256485
    Abstract: A process for the purification of an oxydiphthalic anhydride includes contacting a mixture of an oxydiphthalic anhydride and at least one of the corresponding oxydiphthalic diacid, a corresponding oxydiphthalic tetraacid, a halophthalic anhydride, and a catalyst with a solvent to provide a slurry. The solvent is capable of solubilizing the corresponding oxydiphthalic diacid, the corresponding oxydiphthalic tetraacid, the halophthalic anhydride, and the catalyst at a temperature of 15 to 50° C., and the oxydiphthalic anhydride is substantially insoluble in the solvent at this temperature. The oxydiphthalic anhydride can be isolated from the slurry. A purified oxydiphthalic anhydride and a polyetherimide prepared therefrom are also disclosed.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 22, 2019
    Inventors: Hariharan Ramalingam, Tarun Kumar Pal, Meerakani Mohamed Ali Sait, Thomas Link Guggenheim, Lioba Maria Kloppenburg
  • Patent number: 10294367
    Abstract: A composition comprises, based on the total weight of the composition, 45 wt % to 75 wt % of a polyetherimide; and 20 wt % to 45 wt % of talc; and 5 wt % to 15 wt % of a fluorinated polymer; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 21, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Hariharan Ramalingam, Gaurav Mediratta, Kapil Chandrakant Sheth
  • Publication number: 20190119449
    Abstract: A composition comprises, based on the total weight of the composition, 50 wt % to 90 wt % of a polyetherimide; and 10 wt % to 50 wt % of a filler comprising talc, titanium dioxide, zirconium oxide, neutral aluminum oxide, or a combination comprising at least one of the foregoing; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.
    Type: Application
    Filed: February 22, 2016
    Publication date: April 25, 2019
    Inventors: Kapil Chandrakant Sheth, Hariharan Ramalingam, Gaurav Mediratta
  • Publication number: 20180251634
    Abstract: A composition comprises, based on the total weight of the composition, 25 wt % to 50 wt % of a polyetherimide; and 50 wt % to 75 wt % of a polyphthalamide; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.
    Type: Application
    Filed: February 22, 2016
    Publication date: September 6, 2018
    Inventors: Kapil Chandrakant Sheth, Hariharan Ramalingam, Gaurav Mediratta
  • 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
  • Publication number: 20180051173
    Abstract: A poly(siloxane-etherimide) composition comprising, based on the total weight of the composition, 70 to 90 wt % of a poly(siloxane-etherimide); and an additive comprising a polyester, a filler, or a combination thereof; wherein the filler comprises talc, calcium carbonate, or a combination comprising at least one of the foregoing; and wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.
    Type: Application
    Filed: February 22, 2016
    Publication date: February 22, 2018
    Inventors: Kapil Chandrakant SHETH, Hariharan RAMALINGAM
  • Publication number: 20180044522
    Abstract: A composition comprises, based on the total weight of the composition, 45 wt % to 75 wt % of a polyetherimide; and 20 wt % to 45 wt % of talc; and 5 wt % to 15 wt % of a fluorinated polymer; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85.
    Type: Application
    Filed: February 22, 2016
    Publication date: February 15, 2018
    Inventors: Kapil Chandrakant SHETH, Hariharan RAMALINGAM, Gaurav MEDIRATTA
  • Publication number: 20180044521
    Abstract: A composition comprises, based on the total weight of the composition, 40 to 80 wt % of a polyetherimide; 10 to 50 wt % of talc; and 1 to 15 wt % of a polymer additive comprising a polyphthalamide, a poly(siloxane-etherimide) copolymer, aliphatic polyamide, or a combination comprising at least one of the foregoing; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.
    Type: Application
    Filed: February 22, 2016
    Publication date: February 15, 2018
    Inventors: Kapil Chandrakant Sheth, Hariharan Ramalingam, Gaurav Mediratta
  • Publication number: 20170326823
    Abstract: Disclosed herein are methods for manufacturing a functionally graded polymer material. A method comprises preparing a melted polymer mixture comprising a thermoplastic polymer and a magnetic filler; molding the melted polymer mixture; and applying a magnetic field to a portion of the melted polymer mixture to form the functionally graded article, wherein as the melted polymer mixture flows into the mold, the melted polymer mixture comes into contact with the magnet field. Another method comprises molding the melted polymer mixture; and applying a magnetic field from a first magnet to a first portion of the melted polymer mixture and applying a magnetic field from a second magnet to a second portion of the melted polymer mixture to form the functionally graded article, wherein the first magnet and the second magnet are positioned in a manner such that the magnetic field produced by each are nonoverlapping.
    Type: Application
    Filed: July 20, 2017
    Publication date: November 16, 2017
    Inventors: Poovanna Theethira Kushalappa, Sudhakar Ramamoorthy Marur, Hariharan Ramalingam, Sadasivam Gopalakrishnan
  • Patent number: 9731456
    Abstract: Disclosed herein are methods for manufacturing a functionally graded polymer material. The methods comprise preparing a melted polymer mixture comprising a thermoplastic polymer and a magnetic filler dispersed in the thermoplastic polymer, molding the melted polymer mixture and applying a magnetic field to a portion of the melted polymer mixture to form a functionally graded polymer material. The resulting functionally graded polymer material has a magnetic filler gradient formed through a thickness of the material.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 15, 2017
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Poovanna Theethira Kushalappa, Sudhakar Ramamoorthy Marur, Hariharan Ramalingam, Sadasivam Golakrishanan
  • Patent number: 9200159
    Abstract: A composition including a blend of: a) a polyethersulfone; b) a polyphenylene sulfide (PPS); and c) an epoxy, and optionally a polyetherimide, wherein the polyetherimide and epoxy are present in an amount effective to act as a compatibilizer for the polyethersulfone and polyphenylene sulfide (PPS). Methods of compatibilizing a blend of polyethersulfone and polyphenylene sulfide (PPS). The method can include melt mixing a polyethersulfone, and polyetherimide, a polyphenylene sulfide (PPS) and an epoxy under conditions of elevated temperature and simultaneous mixing.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: December 1, 2015
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Hariharan Ramalingam, Kapil Sheth
  • Patent number: 9169387
    Abstract: Blends of a polyphenylene sulfone (PPSU); a polyphenylene sulfide (PPS); and, a polyetherimide and epoxy. The polyetherimide and epoxy are present in an amount effective to act as a compatibilizer for the polyphenylene sulfone (PPSU) and polyphenylene sulfide (PPS). Methods of compatibilizing a blend of polyphenylene sulfone (PPSU) and polyphenylene sulfide (PPS). The method can include melt mixing a polyphenylene sulfone (PPSU) and a polyetherimide; and melt mixing a polyphenylene sulfide (PPS) and an epoxy.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 27, 2015
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Hariharan Ramalingam, Mark Sanner, Kapil Sheth
  • Patent number: 8859651
    Abstract: Compositions including a blend of a) a polysulfone (PSU); b) a polyphenylene sulfide (PPS); and, c) a polyetherimide and epoxy. The polyetherimide and epoxy can be present in an amount effective to act as a compatibilizer for the polysulfone (PSU) and polyphenylene sulfide (PPS). Various embodiments relate to a method of compatibilizing a blend of polysulfone (PSU) and polyphenylene sulfide (PPS). The method can include a) melt mixing a polysulfone (PSU) and a polyetherimide; and b) melt mixing a polyphenylene sulfide (PPS) and an epoxy. Step a) and b) can be carried out by one of sequential mixing and simultaneous mixing.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 14, 2014
    Assignee: Sabic Global Technologies B.V.
    Inventors: Hariharan Ramalingam, Kapil Sheth
  • Publication number: 20140272119
    Abstract: Disclosed herein are methods for manufacturing a functionally graded polymer material. The methods comprise preparing a melted polymer mixture comprising a thermoplastic polymer and a magnetic filler dispersed in the thermoplastic polymer, molding the melted polymer mixture and applying a magnetic field to a portion of the melted polymer mixture to form a functionally graded polymer material. The resulting functionally graded polymer material has a magnetic filler gradient formed through a thickness of the material.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Poovanna Theethira Kushalappa, Sudhakar Ramamoorthy Marur, Hariharan Ramalingam, Sadasivam Golakrishanan
  • Publication number: 20140194580
    Abstract: Compositions including a blend of a) a polysulfone (PSU); b) a polyphenylene sulfide (PPS); and, c) a polyetherimide and epoxy. The polyetherimide and epoxy can be present in an amount effective to act as a compatibilizer for the polysulfone (PSU) and polyphenylene sulfide (PPS). Various embodiments relate to a method of compatibilizing a blend of polysulfone (PSU) and polyphenylene sulfide (PPS). The method can include a) melt mixing a polysulfone (PSU) and a polyetherimide; and b) melt mixing a polyphenylene sulfide (PPS) and an epoxy. Step a) and b) can be carried out by one of sequential mixing and simultaneous mixing.
    Type: Application
    Filed: March 8, 2013
    Publication date: July 10, 2014
    Applicant: SABIC INNOVATIVE PLASTICS IP B.V.
    Inventors: Hariharan Ramalingam, Kapil Sheth
  • Publication number: 20140194556
    Abstract: Blends of a polyphenylene sulfone (PPSU); a polyphenylene sulfide (PPS); and, a polyetherimide and epoxy. The polyetherimide and epoxy are present in an amount effective to act as a compatibilizer for the polyphenylene sulfone (PPSU) and polyphenylene sulfide (PPS). Methods of compatibilizing a blend of polyphenylene sulfone (PPSU) and polyphenylene sulfide (PPS). The method can include melt mixing a polyphenylene sulfone (PPSU) and a polyetherimide; and melt mixing a polyphenylene sulfide (PPS) and an epoxy.
    Type: Application
    Filed: March 8, 2013
    Publication date: July 10, 2014
    Applicant: SABIC Innovative Plastics IP B.V.
    Inventors: Hariharan Ramalingam, Mark Sanner, Kapil Sheth
  • Publication number: 20140194579
    Abstract: A composition including a blend of: a) a polyethersulfone; b) a polyphenylene sulfide (PPS); and c) an epoxy, and optionally a polyetherimide, wherein the polyetherimide and epoxy are present in an amount effective to act as a compatibilizer for the polyethersulfone and polyphenylene sulfide (PPS). Methods of compatibilizing a blend of polyethersulfone and polyphenylene sulfide (PPS). The method can include melt mixing a polyethersulfone, and polyetherimide, a polyphenylene sulfide (PPS) and an epoxy under conditions of elevated temperature and simultaneous mixing.
    Type: Application
    Filed: March 8, 2013
    Publication date: July 10, 2014
    Applicant: SABIC INNOVATIVE PLASTICSIP B.V.
    Inventors: Hariharan Ramalingam, Kapil Sheth
  • 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
  • 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