Patents by Inventor Janardan K. Nambodari

Janardan K. Nambodari 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).

  • Polyether ketone, its monomer and its phenolate
    Patent number: 7879199
    Abstract: A process for the preparation of an alkali metal salt of 4-chloro-4?-hydroxy benzophenone including the steps of (a) preparing purified 4-chloro-4?-hydroxy benzophenone by a process including distilling under reduced pressure a liquid containing 4-chloro-4?-hydroxy benzophenone and a solvent selected from diphenyl sulphone, diphenylene sulphone, benzophenone and dichlorobenzophenone, and then (b) preparing the alkali metal salt of thus purified 4-chloro-4?-hydroxy benzophenone by the reaction of the purified 4-chloro-4?-hydroxy benzophenone with a stoichiometric excess of at least one alkali metal base. There is also described a polymerization process using the alkali metal salt to yield PEK with high inherent viscosity and improved mechanical and thermal properties.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: February 1, 2011
    Assignee: Gharda Chemicals Limited
    Inventors: Keki Hormusji Gharda, Ashokkumar M. Malte, Suchet S. Mathur, Pulinattu C. Joseph, Mathew Abraham, Janardan K. Nambodari, Sanjay C. Limaye, Shekhar V. Sathe, Kailas Ambadas Chavan, Deepak R. Naladkar
  • Polyether ketone, its monomer and its phenolate
    Publication number: 20090240020
    Abstract: A process for the preparation of an alkali metal salt of 4-chloro-4?-hydroxy benzophenone including the steps of (a) preparing purified 4-chloro-4?-hydroxy benzophenone by a process including distilling under reduced pressure a liquid containing 4-chloro-4?-hydroxy benzophenone and a solvent selected from diphenyl sulphone, diphenylene sulphone, benzophenone and dichlorobenzophenone, and then (b) preparing the alkali metal salt of thus purified 4-chloro-4?-hydroxy benzophenone by the reaction of the purified 4-chloro-4?-hydroxy benzophenone with a stoichiometric excess of at least one alkali metal base. There is also described a polymerization process using the alkali metal salt to yield PEK with high inherent viscosity and improved mechanical and thermal properties.
    Type: Application
    Filed: April 29, 2008
    Publication date: September 24, 2009
    Inventors: Keki Hormusji Gharda, Ashokkumar M. Malte, Suchet S. Mathur, Pulinattu C. Joseph, Mathew Abraham, Janardan K. Nambodari, Sanjay C. Limaye, Shekhar V. Sathe, K. A. Chavan, Deepak R. Naladkar