Patents by Inventor L. Chandrashekar

L. Chandrashekar 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).

  • Publication number: 20160106805
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: November 2, 2015
    Publication date: April 21, 2016
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Patent number: 9254307
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: February 9, 2016
    Assignee: Tolmar Therapeutics, Inc.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Publication number: 20150150937
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: February 11, 2015
    Publication date: June 4, 2015
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Patent number: 8486455
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: July 16, 2013
    Assignee: Tolmar Therapeutics, Inc.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Publication number: 20100234305
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: May 20, 2010
    Publication date: September 16, 2010
    Applicant: QLT USA, INC.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Publication number: 20100226954
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: May 20, 2010
    Publication date: September 9, 2010
    Applicant: QLT USA, INC.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Publication number: 20090295609
    Abstract: A system and method for reducing the power dissipated in an Analog to Digital Converter (ADC). The method includes the steps of: receiving a residue output from a previous phase of a plurality of clock phases where the plurality of clock phases includes a sample-and-hold phase and an amplifying phase for sampling and amplifying an analog input signal respectively, eliminating an effect of load on a residue amplifier when amplifying the residue output to generate an amplified residue output in the amplifying phase, and eliminating an effect of small feedback factor when sampling the amplified residue output in the sample-and-hold phase. Power advantage is achieved by sharing the load on the residue amplifier across the sample-and-hold phase and the amplifying phase rather than being fully present in any one of the clock phases. The present invention also provides a method for reducing the number of comparators used in ADCs.
    Type: Application
    Filed: June 9, 2007
    Publication date: December 3, 2009
    Inventors: T. S. Venkatesh, L. Chandrashekar, Prasun Kali Bhattacharya, Prasenjit Bhowmik, C. Srinivasan, Mukesh Khatri, Sanjeeb Kumar Ghosh, Sumanth Chakkirala, Sundararajan Krishnan, Prakash Easwaran
  • Publication number: 20070285297
    Abstract: A system and method for improving the dynamic performance in an analog-to-digital converter (ADC) by randomizing the differential mismatch. The differential mismatch in an input analog signal is randomized by flipping the input signal and output signal randomly.
    Type: Application
    Filed: June 9, 2007
    Publication date: December 13, 2007
    Inventors: T. S. Venkatesh, L. Chandrashekar, Prasun Kali Bhattacharya, Prasenjit Bhowmik, C. Srinivasan, Mukesh Khatri, Sanjeeb Kumar Ghosh, Sumanth Chakkirala, Sundararajan Krishnan, Prakash Easwaran
  • Publication number: 20040229912
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: June 21, 2004
    Publication date: November 18, 2004
    Applicant: Atrix Laboratories, Inc.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Patent number: 6773714
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: August 10, 2004
    Assignee: Atrix Laboratories, Inc.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Patent number: 6630155
    Abstract: The invention provides a controlled release polymeric composition which includes a base polymer or copolymer, an organic solvent, a polymeric controlled release additive, and a biologically active agent. The polymeric controlled release additive reduces the initial burst of biologically active agent released from the polymeric composition as it is solidifying to form the solid implant. The controlled release additive is preferably a poly(lactide-co-glycolide)/polyethylene glycol block copolymer.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: October 7, 2003
    Assignee: Atrix Laboratories, Inc.
    Inventors: Bhagya L. Chandrashekar, Mingxing Zhou, Eileen M. Jarr, Richard L. Dunn
  • Publication number: 20030133964
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Application
    Filed: February 24, 2003
    Publication date: July 17, 2003
    Applicant: Atrix Laboratories, Inc.
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
  • Patent number: 6565874
    Abstract: The present invention is directed to a flowable composition that is suitable for use as a controlled release implant. The flowable composition includes a biodegradable thermoplastic polyester that is at least substantially insoluble in aqueous medium or body fluid. The flowable composition also includes a biocompatible polar aprotic solvent. The biocompatible polar aprotic solvent is miscible to dispersible in aqueous medium or body fluid. The flowable composition also includes leuprolide acetate.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: May 20, 2003
    Assignee: Atrix Laboratories
    Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L Chandrashekar
  • Patent number: 6261583
    Abstract: The invention provides an implant composition for sustained delivery of a biologically active agent. The implant composition includes a biologically active agent, a thermoplastic polymer, an organic liquid and a small amount of an aqueous medium. The thermoplastic polymer is insoluble in water so that the implant composition has the form of a substantially homogeneous pliable, moldable solid.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: July 17, 2001
    Assignee: Atrix Laboratories, Inc.
    Inventors: Richard L. Dunn, Bhagya L. Chandrashekar, Kathleen A. McEnery
  • Patent number: 6143314
    Abstract: The invention provides a controlled release polymeric composition which includes a base polymer or copolymer, an organic solvent, a polymeric controlled release additive, and a biologically active agent. The polymeric controlled release additive reduces the initial burst of biologically active agent released from the polymeric composition as it is solidifying to form the solid implant. The controlled release additive is preferably a poly(lactide-co-glycolide)/polyethylene glycol block copolymer.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: November 7, 2000
    Assignee: Atrix Laboratories, Inc.
    Inventors: Bhagya L. Chandrashekar, Mingxing Zhou, Eileen M. Jarr, Richard L. Dunn