Patents by Inventor Nirmalya Chakravorty

Nirmalya Chakravorty 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).

  • Hybrid polyester fluorocarbon powder coating composition and process for manufacture thereof
    Patent number: 8853320
    Abstract: The invention relates to hybrid polyester-fluorocarbon powder coating composition and the manufacture thereof. These powder coating compositions are manufactured in a process comprising the steps of: Preparation of a polyester powder coating composition A, comprising a polyester resin and a curing agent for said polyester resin; Preparation of a fluorocarbon powder coating composition B, comprising a fluorocarbon resin and a curing agent for said fluorocarbon resin; and Dry blending said polyester powder coating composition A and fluorocarbon powder coating composition B, wherein the weight ratio of polyester powder coating composition A to fluorocarbon powder coating composition B is in the range of 70:30 to 30:70.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: October 7, 2014
    Assignee: Akzo Nobel Powder Coatings (Ningbo) Co., Ltd.
    Inventors: Lijum Wang, Wei Jiang, Graeme Alan Bell, Nirmalya Chakravorty
  • HYBRID POLYESTER FLUOROCARBON POWDER COATING COMPOSITION AND PROCESS FOR MANUFACTURE THEREOF
    Publication number: 20130196062
    Abstract: Hybrid polyester-fluorocarbon powder coating composition and manufacture thereof are provided. These powder coating compositions are manufactured in a process comprising the steps of:—Preparation of a polyester powder coating composition A, comprising a polyester resin and a curing agent for said polyester resin;—Preparation of a fluorocarbon powder coating composition B, comprising a fluorocarbon resin and a curing agent for said fluorocarbon resin; and—Dry blending said polyester powder coating composition A and fluorocarbon powder coating composition B, wherein the weight ratio of polyester powder coating composition A to fluorocarbon powder coating composition B is in the range of 70:30 to 30:70.
    Type: Application
    Filed: October 13, 2011
    Publication date: August 1, 2013
    Applicant: Akzo Nobel Powder Coatings (NINGBO) Co., Ltd.
    Inventors: Lijun Wang, Wei Jiang, Graeme Alan Bell, Nirmalya Chakravorty