Patents by Inventor Nileshkumar Kukalyekar

Nileshkumar Kukalyekar 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).

  • Publication number: 20070135661
    Abstract: Disclosed herein are silicone resins comprising structural units of the formulae: and at least one structural unit selected from the group consisting of: where “A” is a spacer group comprising C2 to C50 alkyl groups; “B” and “C” are spacer groups comprising C2 to C20 alkyl groups; “M1” comprises a Group III element,; R1, R3, R6, and R7 independently comprise OH, alkyl groups, or alkoxy groups; R2 and R4 independently comprise hydrogen, alkali metal, or alkyl groups; and R5 comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.
    Type: Application
    Filed: February 5, 2007
    Publication date: June 14, 2007
    Inventors: Gurram Kishan, Rajappan Vetrivel, Nileshkumar Kukalyekar, Adil Dhalla
  • Patent number: 7015365
    Abstract: A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula: where [A] is a substituted or an unsubstituted aromatic group, R1–R4 independently represent a hydrogen or a C1–C12 hydrocarbyl group; and “a” and “b” are integers independently having values from 0–3; with an aromatic hydroxy compound of formula [A]-OH, where [A] is as previously described; at a mole ratio of greater than or equal to about 20, in the presence of a sulfonic acid type ion exchange resin catalyst crosslinked with greater than or equal to about 8 weight percent of divinylbenzene, and a promoter selected from the group consisting of a mercaptan compound and a resorcinol compound; to form a cycloalkylidene bisphenol of formula: where [A], R1–R4, “a” and “b” are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: March 21, 2006
    Assignee: General Electric Company
    Inventors: Debjani Kapila, Ramesh Krishnamurti, Jan-Pleun Lens, Gurram Kishan, Nileshkumar Kukalyekar, Jegadeesh Thampi, Umesh Krishna Hasyagar, Vinod Kumar Rai, Ashok S. Shyadligeri, Radhakrishna Sreenivasarao Arakali, Edward J. Nesakumar, Pramod Kumbhar
  • Publication number: 20050137428
    Abstract: A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula: where [A] is a substituted or an unsubstituted aromatic group, R1-R4 independently represent a hydrogen or a C1-C12 hydrocarbyl group; and “a” and “b” are integers independently having values from 0-3; with an aromatic hydroxy compound of formula [A]-OH, where [A] is as previously described; at a mole ratio of greater than or equal to about 20, in the presence of a sulfonic acid type ion exchange resin catalyst crosslinked with greater than or equal to about 8 weight percent of divinylbenzene, and a promoter selected from the group consisting of a mercaptan compound and a resorcinol compound; to form a cycloalkylidene bisphenol of formula: where [A], R1-R4, “a” and “b” are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.
    Type: Application
    Filed: December 19, 2003
    Publication date: June 23, 2005
    Inventors: Debjani Kapila, Ramesh Krishnamurti, Jan-Pleun Lens, Gurram Kishan, Nileshkumar Kukalyekar, Jegadeesh Thampi, Umesh Hasyagar, Vinod Rai, Ashok Shyadligeri, Radhakrishna Arakali, Edward Nesakumar, Pramod Kumbhar
  • Publication number: 20050070423
    Abstract: Disclosed herein are zeolite compositions comprising structural units of the formulae: wherein “B” and “C” are spacer groups comprising C2 to C20 hydrocarbyl groups; and R1 and R2 independently of each other comprise alkali metal, hydrogen, or C1 to C20 alkyl groups. The zeolite compositions further comprise structural units derived from a heteropolyacid compound of the formula: (M3)3(M4)(M5)12O40; where M3 comprises hydrogen or an alkali metal; M4 comprises phosphorus or silicon, and M5 comprises tungsten or molybdenum. Methods for preparing these zeolite compositions are also disclosed. The zeolite compositions are useful as catalysts for producing bisphenols.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventors: Gurram Kishan, Rajappan Vetrivel, Nileshkumar Kukalyekar, Adil Dhalla, Jonathan Male, James Spivack, Arumugamangalam Ramaswamy, Anand Singh
  • Publication number: 20050033002
    Abstract: Disclosed herein are silicone resins comprising structural units of the formulae: and at least one structural unit selected from the group consisting of: where “A” is a spacer group comprising C2 to C50 alkyl groups; “B” and “C” are spacer groups comprising C2 to C20 alkyl groups; “M1” comprises a Group III element; R1, R3, R6, and R7 independently comprise OH, alkyl groups, or alkoxy groups; R2 and R4 independently comprise hydrogen, alkali metal, or alkyl groups; and R5 comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.
    Type: Application
    Filed: August 8, 2003
    Publication date: February 10, 2005
    Inventors: Gurram Kishan, Rajappan Vetrivel, Nileshkumar Kukalyekar, Adil Dhalla