Patents by Inventor Mahesh Malusare

Mahesh Malusare 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 for the purification of dihydric phenols
    Patent number: 7541417
    Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A, contacting the solution A with an adsorbent material selected from the group consisting of metal oxides, modified metal oxides, activated carbons, and clays, filtering the adsorbent material to form a solution B, adding an anti-solvent to the solution B to form a solution C, and distilling the solution C, wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value of 1 to 4.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 2, 2009
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan, Ramanarayanan GV, Arun Dixit, Pradeep Nadkarni, Jan Plen Lens
  • Method of purification of dihydric phenols
    Patent number: 7528210
    Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A; contacting the solution A with a zeolite; filtering the zeolite to form a solution B; adding an anti-solvent to the solution B to form a solution C; and distilling the solution C; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value 1 to 4.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: May 5, 2009
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Guohua Xiu, Tong Sun, Jan Plen Lens, Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan
  • Method of stabilization of dihydric phenols
    Patent number: 7521505
    Abstract: A method of producing a polycarbonate, the method comprising: polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters; wherein the amount of oxalic acid ranges from about 20 parts per million to about 350 parts per million, relative to an amount of the dihydric phenol; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1 to 4.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: April 21, 2009
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Venugopal Boddapaty Venkata, Gurram Kishan, Jan Pleun Lens, Daniel Francis Lowery, Mahesh Malusare, Patrick Joseph McCloskey, Manisha Potdar
  • METHOD OF STABILIZATION OF DIHYDRIC PHENOLS
    Publication number: 20070287797
    Abstract: A method of producing a polycarbonate, the method comprising: polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters; wherein the amount of oxalic acid ranges from about 20 parts per million to about 350 parts per million, relative to an amount of the dihydric phenol; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1 to 4.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 13, 2007
    Applicant: General Electric Company
    Inventors: Venugopal BV, Gurram Kishan, Jan Pleun Lens, Daniel Francis Lowery, Mahesh Malusare, Patrick Joseph McCloskey, Manisha Potdar
  • METHOD OF PURIFICATION OF DIHYDRIC PHENOLS
    Publication number: 20070232774
    Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A; contacting the solution A with a zeolite; filtering the zeolite to form a solution B; adding an anti-solvent to the solution B to form a solution C; and distilling the solution C; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value 1 to 4.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 4, 2007
    Applicant: General Electric Company
    Inventors: Guohua Xiu, Tong Sun, Jan Lens, Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan
  • PROCESS FOR THE PURIFICATION OF DIHYDRIC PHENOLS
    Publication number: 20070232775
    Abstract: A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A, contacting the solution A with an adsorbent material selected from the group consisting of metal oxides, modified metal oxides, activated carbons, and clays, filtering the adsorbent material to form a solution B, adding an anti-solvent to the solution B to form a solution C, and distilling the solution C, wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value of 1 to 4.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 4, 2007
    Applicant: General Electric Company
    Inventors: Sunil Ashtekar, Mahesh Malusare, Gurram Kishan, Pushpa Narayanan, Ramanarayanan GV, Arun Dixit, Pradeep Nadkarni, Jan Lens