Patents by Inventor Sivamurugan VAJIRAVELU

Sivamurugan VAJIRAVELU 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).

  • Acid dyes, process for the production thereof and their use
    Patent number: 9745474
    Abstract: Dyes of formula (1) their production and their use are described.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: August 29, 2017
    Assignee: DyStar Colours Distribution GmbH
    Inventors: Roxana Barbieru, Sivamurugan Vajiravelu, Wei Tian Loh
  • Acid dyes, process for the production thereof and their use
    Patent number: 9725597
    Abstract: Dye(s) of formula (I) process for their production and their use are described.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: August 8, 2017
    Assignee: DyStar Colours Distribution GmbH
    Inventors: Roxana Barbieru, Sivamurugan Vajiravelu, Wei Tian Loh
  • Metal free acid dyes, process for the production thereof and their use
    Patent number: 9714347
    Abstract: The present invention relates to dyes of formula (1) a process for preparing them and their use for dyeing and printing hydroxyl- and/or carboxamido-containing materials.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: July 25, 2017
    Assignee: DyStar Colours Distribution GmbH
    Inventors: Roxana Barbieru, Sivamurugan Vajiravelu, Say Wan Yong, Ravi Vedarethinam
  • Acid dyes, process for the production thereof and their use
    Patent number: 9624376
    Abstract: Dyes of formula (1) their preparation and use are described.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: April 18, 2017
    Assignee: DyStar Colours Distribution GmbH
    Inventor: Sivamurugan Vajiravelu
  • ACID DYES, PROCESS FOR THE PRODUCTION THEREOF AND THEIR USE
    Publication number: 20160264784
    Abstract: Dyes of formula (1) their preparation and use.
    Type: Application
    Filed: October 22, 2014
    Publication date: September 15, 2016
    Inventor: Sivamurugan VAJIRAVELU
  • ACID DYES, PROCESS FOR THE PRODUCTION THEREOF AND THEIR USE
    Publication number: 20160264783
    Abstract: Dyes of formula (1) their production and their use.
    Type: Application
    Filed: October 22, 2014
    Publication date: September 15, 2016
    Inventors: Roxana BARBIERU, Sivamurugan VAJIRAVELU, Wei Tian LOH
  • ACID DYES, PROCESS FOR THE PRODUCTION THEREOF AND THEIR USE
    Publication number: 20160257817
    Abstract: Dye(s) of formula (I) process for their production and their use.
    Type: Application
    Filed: October 22, 2014
    Publication date: September 8, 2016
    Inventors: Roxana BARBIERU, Sivamurugan VAJIRAVELU, Wei Tian LOH
  • METAL FREE ACID DYES, PROCESS FOR THE PRODUCTION THEREOF AND THEIR USE
    Publication number: 20150315386
    Abstract: The present invention relates to dyes of formula (1) a process for preparing them and their use for dyeing and printing hydroxyl- and/or carboxamido-containing materials.
    Type: Application
    Filed: December 3, 2013
    Publication date: November 5, 2015
    Applicant: DyStar Coulours Distribution GmbH
    Inventors: Roxana BARBIERU, Sivamurugan VAJIRAVELU, Say Wan YONG, Ravi VEDARETHINAM