Patents by Inventor Nag Kumar

Nag Kumar 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).

  • Patent number: 11980992
    Abstract: Embodiments described herein relate to integrated abrasive (IA) polishing pads, and methods of manufacturing IA polishing pads using, at least in part, surface functionalized abrasive particles in an additive manufacturing process, such as a 3D inkjet printing process. In one embodiment, a method of forming a polishing article includes dispensing a first plurality of droplets of a first precursor, curing the first plurality of droplets to form a first layer comprising a portion of a sub-polishing element, dispensing a second plurality of droplets of the first precursor and a second precursor onto the first layer, and curing the second plurality of droplets to form a second layer comprising portions of the sub-polishing element and portions of a plurality of polishing elements. Here, the second precursor includes functionalized abrasive particles having a polymerizable group chemically bonded to surfaces thereof.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: May 14, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Ashavani Kumar, Ashwin Chockalingam, Sivapackia Ganapathiappan, Rajeev Bajaj, Boyi Fu, Daniel Redfield, Nag B. Patibandla, Mario Dagio Cornejo, Amritanshu Sinha, Yan Zhao, Ranga Rao Arnepalli, Fred C. Redeker
  • Publication number: 20070244184
    Abstract: The compounds of the present invention relate to chain-extended and chain-modified analogues of salacinol, including embodiments where the sulfate moiety has been substituted with a carboxylate or phosphate moiety. In other embodiments the sulfate moiety has been shifted by one carbon atom in the zwitterionic structure. In another embodiment the polyhydroxylated side chain may be replaced with a lipophilic alkyl chain and a suitable counterion. The invention also encompasses methods for synthesizing the salacinol analogues and using the analogues for enzyme inhibition applications.
    Type: Application
    Filed: January 9, 2007
    Publication date: October 18, 2007
    Applicant: SIMON FRASER UNIVERSITY
    Inventors: Brian Pinto, Nag Kumar, Ramakrishna Bhat, Hui Liu, Ravindranath Nasi, Wang Chen, Sankar Mohan
  • Publication number: 20060247222
    Abstract: Methods for synthesizing Salacinol, its stereoisomers, and analogues, homologues and other derivatives thereof potentially useful as glycosidase inhibitors are described. In some embodiments the compounds of the invention may have the general formula (I) or (II): The synthetic schemes may comprise reacting a cyclic sulfate with a 5-membered ring sugar containing a heteroatom (X). The heteroatom preferably comprises sulfur, selenium, or nitrogen. The cyclic sulfate and ring sugar reagents may be readily prepared from carbohydrate precursors, such as D-glucose, L-glucose, D-xylose and L-xylose. The target compounds are prepared by opening of the cyclic sulfates by nucleophilic attack of the heteroatoms on the 5-membered ring sugars. The resulting heterocyclic compounds have a stable, inner salt structure comprising a heteroatom cation and a sulfate anion. The synthetic schemes yield various stereoisomers of the target compounds in moderate to good yields with limited side-reactions.
    Type: Application
    Filed: March 2, 2006
    Publication date: November 2, 2006
    Applicant: Simon Fraser University
    Inventors: Brian Pinto, Blair Johnston, Ahmad Ghavami, Monica Szczepina, Hui Liu, Kashinath Sadalapure, Henrik Jensen, Nag Kumar, Ravindranath Nasi