Patents by Inventor Thimma R. Rawalpally

Thimma R. Rawalpally 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).

  • Methods of making a particle having an attached stable free radical
    Patent number: 6551393
    Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: wherein Ar represents an aromatic group; R1 represents a bond, an arylene group, an alkylene group, wherein R4 is an alkyl or alkylene group or an aryl or arylene group; R2 and R3, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR5, —NHR5, —NR5R5, or —SR5, wherein R5, which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: April 22, 2003
    Assignee: Cabot Corporation
    Inventors: Wayne Devonport, Robert S. Whitehouse, Russell L. Warley, Thimma R. Rawalpally, Hairuo Tu
  • Methods of making a particle having an attached stable free radical
    Publication number: 20020098144
    Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: 1
    Type: Application
    Filed: February 1, 2002
    Publication date: July 25, 2002
    Inventors: Wayne Devonport, Robert S. Whitehouse, Russell L. Warley, Thimma R. Rawalpally, Hairuo Tu
  • Methods of making a particle having an attached stable free radical
    Patent number: 6368239
    Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: wherein Ar represents an aromatic group; R1 represents a bond, an arylene group, an alkylene group, wherein R4 is an alkyl or alkylene group or an aryl or arylene group; R2 and R3, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, —OR5, —NHR5, —NR5R5, or —SR5, wherein R5, which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: April 9, 2002
    Assignee: Cabot Corporation
    Inventors: Wayne Devonport, Robert S. Whitehouse, Russell L. Warley, Thimma R. Rawalpally, Hairuo Tu
  • Particle having an attached stable free radical and methods of making the same
    Patent number: 6068688
    Abstract: A modified particle is disclosed wherein a particle has an attached group having the formula: ##STR1## wherein Ar represents an aromatic group; R.sup.1 represents a bond, an arylene group, an alkylene ##STR2## wherein R.sup.4 is an alkyl or alkylene group or an aryl or arylene group; R.sup.2 and R.sup.3, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, --OR.sup.5, --NHR.sup.5, --NR.sup.5 R.sup.5, or --SR.sup.5, wherein R.sup.5, which is the same or different, represents an alkyl group or an aryl group; and SFR represents a stable free radical. Also disclosed is a modified particle or aggregate having attached a group having the formula: ##STR3## wherein CoupA represents a Si-containing group, a Ti-containing group, or a Zr-containing group; R.sup.8 and R.sup.9, which can be the same or different, represent hydrogen, an alkyl group, an aryl group, --OR.sup.10, --NHR.sup.10, --NR.sup.10 R.sup.10, or --SR.sup.10, wherein R.sup.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: May 30, 2000
    Assignee: Cabot Corporation
    Inventors: Robert S. Whitehouse, Russell L. Warley, Thimma R. Rawalpally, Hairuo Tu