Patents by Inventor Radhakrishna Arakali Srinivasarao

Radhakrishna Arakali Srinivasarao 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: 7678864
    Abstract: A silylated polycarbonate comprises silylated carbonate units, where the silylated carbonate units can be derived from a silylated dihydroxy aromatic compound of the formula (1a): wherein Ga and Gb are each independently C1-12 alkyl, —OSi(C1-12 alkyl)3, C1-12 arylalkyl, or —OSi(C1-12 arylalkyl)3; Za and Zb are each independently a straight or branched C2-18 alkylene, a C8-18 arylalkylene, or a C8-18 alkylarylene, Xa is a direct bond, a heteroatom-containing group, or a C1-18 organic group, and r and s are each independently 1 or 2. A method of forming the silylated dihydroxy aromatic compound, and for forming the silylated polycarbonate, are disclosed. Also disclosed is a thermoplastic composition comprising the silylated polycarbonate, and an article comprising the thermoplastic composition.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: March 16, 2010
    Assignee: SABIC Innovative Plastics IP B.V.
    Inventors: Jan Pleun Lens, Tilak Thulasi Raj, Subarna Shyamroy, Radhakrishna Arakali Srinivasarao, Scindia Dattu Subash
  • Patent number: 7425603
    Abstract: A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1, R2 and R3 are independently at each occurrence selected from the group consisting of a cyano functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons, and an aromatic functionality having 6 to 10 carbons; wherein each occurrence of “n”, “m”, and “p” independently has a value of 0, 1, 2, 3, or 4; and wherein the polymer is substantially linear.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: September 16, 2008
    Assignee: General Electric Company
    Inventors: T. Tilak Raj, Radhakrishna Arakali Srinivasarao, Jan-Pleun Lens, Subrahmanya Bhat K., Umesh Hasyagar, Subash Scindia
  • Patent number: 7375177
    Abstract: A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I) wherein R1 is an aromatic divalent functionality having 6 to 60 carbons, R2 can be the same or different at each occurrence and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons and “n” is an integer having a value 0 to 3.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: May 20, 2008
    Assignee: General Electric Company
    Inventors: Nagarajan Arumugam, Radhakrishna Arakali Srinivasarao, Jan Pleun Lens, Tilak Raj, Binod Sahoo, Subash Scindia
  • Patent number: 7326763
    Abstract: A polymer comprises structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10 carbons, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; R2 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic ester functionality having 2 to 10 carbons, a cycloaliphatic ester functionality having 4 to 10 carbons and an aromatic ester functionality having 4 to 10 carbons; and R3 and R4 are independently at each occurrence a hydrogen, an aliphatic functionality having 1 to 10 carbons or a cycloaliphatic functionality having 3 to 10 carbons.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: February 5, 2008
    Assignee: General Electric Company
    Inventors: Jan Henk Kamps, Jan-Pleun Lens, James A. Mahood, Radhakrishna Arakali Srinivasarao, T. Tilak Raj, Ravindra Vikram Singh