Patents Assigned to National Chemical Laboratory
  • Silicon containing polyarylates
    Patent number: 5820992
    Abstract: The present invention provides a process for preparing membranes using novel silicon containing polyarylates of Formula I ##STR1## where R.sub.1 to R.sub.8 represent hydrogen, alkyl groups containing 1 to 5 methylene group or halogen atoms, R.sub.9 and R.sub.10 represents alkyl groups containing 1 to 5 carbon atoms or CF.sub.3 group and R.sub.11 and R.sub.12 represent alkyl groups with 1 to 5 carbon atoms or phenyl groups.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: October 13, 1998
    Assignee: National Chemical Laboratory
    Inventors: Arun Savalaram Jadhav, Jayarani Purushotham, Sudhir Sharad Chandra Kulkarni, Subhash Pundlik Vernekar
  • Silicon containing polyarylates
    Patent number: 5606000
    Abstract: The present invention provides novel silicon containing polyarylates of Formula I ##STR1## where R.sub.1 to R.sub.8 represent hydrogen, alkyl groups containing 1 to 5 methylene group or halogen atoms, R.sub.9 and R.sub.10 represents alkyl groups containing 1 to 5 carbon atoms or CF.sub.3 group and R.sub.11 and R.sub.12 represent alkyl groups with 1 to 5 carbon atoms or phenyl groups.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: February 25, 1997
    Assignee: National Chemical Laboratory
    Inventors: Arun S. Jadhav, Jayarani Purushotham, Sudhir S. C. Kulkarni, Subhash P. Vernekar