Patents by Inventor Durgaprasad Chalasani

Durgaprasad Chalasani 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).

  • Intravaginal ring comprising polyurethane composition for drug delivery
    Patent number: 9603932
    Abstract: Intravaginal drug delivery device comprising at least one pharmaceutically active substance, and a polyurethane copolymer, wherein the copolymer has the structure according to formula (I): Also, method comprising administering one or more pharmaceutically active substances to a patient in need thereof.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: March 28, 2017
    Assignee: DSM IP ASSETS, B.V.
    Inventors: Robert S. Ward, Shanger Wang, Li Li, Durgaprasad Chalasani, Patrick Kiser, Meredith Roberts Clark
  • Intravaginal ring comprising polyurethane composition for drug delivery
    Patent number: 9393311
    Abstract: The invention is directed to an intravaginal drug delivery device comprising at least one pharmaceutically active substance, and a polyurethane copolymer, wherein the copolymer has the structure according to formula (I): The invention is further directed to administering one or more pharmaceutically active substances to a patient in need thereof.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: July 19, 2016
    Assignees: DSM IP ASSETS B.V., DSM BIOMEDICAL INC.
    Inventors: Robert S. Ward, Shanger Wang, Li Li, Durgaprasad Chalasani, Patrick Kiser, Meredith Roberts Clark
  • INTRAVAGINAL DRUG DELIVERY DEVICE COMPRISING A POLYURETHANE COPOLYMER
    Publication number: 20160120800
    Abstract: Intravaginal drug delivery device comprising at least one pharmaceutically active substance, and a polyurethane copolymer, wherein the copolymer has the structure according to formula (I): Also, method comprising administering one or more pharmaceutically active substances to a patient in need thereof.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Applicant: DSM IP ASSETS B.V.
    Inventors: Robert S. WARD, Shanger WANG, Li Li, Durgaprasad CHALASANI, Patrick KISER, Meredith Roberts CLARK
  • Silicone-containing monomer
    Patent number: 9086527
    Abstract: Silicone-containing monomer of formula (I); wherein said silicone-containing monomer comprises a silicone-containing moiety and an oxazolidinone moiety and wherein R is a silicone-containing moiety, and R1 may be an H, wherein A represents the oxazolidinone ring of the oxazolidinone moiety and R2 is a divalent C1-25 alkylene or C6-30 arylalkylene. The monomer is used for the preparation of a composition for use in manufacturing of ophthalmic lenses potentially with anti-infective properties. Also, methods of making the present monomers are described.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: July 21, 2015
    Assignee: DSM IP ASSETS B.V.
    Inventors: James Parakka, Ananth Iyer, Durgaprasad Chalasani, Li Li
  • SILICONE-CONTAINING MONOMER
    Publication number: 20140206830
    Abstract: Silicone-containing monomer of formula (I); wherein said silicone-containing monomer comprises a silicone-containing moiety and an oxazolidinone moiety and wherein R is a silicone-containing moiety, and R1 may be an H, wherein A represents the oxazolidinone ring of the oxazolidinone moiety and R2 is a divalent C1-25 alkylene or C6-30 arylalkylene. The monomer is used for the preparation of a composition for use in manufacturing of ophthalmic lenses potentially with anti-infective properties. Also, methods of making the present monomers are described.
    Type: Application
    Filed: December 17, 2013
    Publication date: July 24, 2014
    Inventors: James Parakka, Ananth Iyer, Durgaprasad Chalasani, Li Li
  • INTRAVAGINAL RING COMPRISING POLYURETHANE COMPOSITION FOR DRUG DELIVERY
    Publication number: 20140045792
    Abstract: The invention is directed to an intravaginal drug delivery device comprising at least one pharmaceutically active substance, and a polyurethane copolymer, wherein the copolymer has the structure according to formula (I): The invention is further directed to administering one or more pharmaceutically active substances to a patient in need thereof.
    Type: Application
    Filed: November 15, 2011
    Publication date: February 13, 2014
    Applicant: DSM IP ASSETS B.V.
    Inventors: Robert S. Ward, Shanger Wang, Li Li, Durgaprasad Chalasani, Patrick Kiser, Meredith Roberts Clark