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).
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Publication number: 20160106805Abstract: 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: ApplicationFiled: November 2, 2015Publication date: April 21, 2016Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Patent number: 9254307Abstract: 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: GrantFiled: May 20, 2010Date of Patent: February 9, 2016Assignee: Tolmar Therapeutics, Inc.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Publication number: 20150150937Abstract: 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: ApplicationFiled: February 11, 2015Publication date: June 4, 2015Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Patent number: 8486455Abstract: 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: GrantFiled: May 20, 2010Date of Patent: July 16, 2013Assignee: Tolmar Therapeutics, Inc.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Publication number: 20100234305Abstract: 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: ApplicationFiled: May 20, 2010Publication date: September 16, 2010Applicant: QLT USA, INC.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Publication number: 20100226954Abstract: 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: ApplicationFiled: May 20, 2010Publication date: September 9, 2010Applicant: QLT USA, INC.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Publication number: 20090295609Abstract: 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: ApplicationFiled: June 9, 2007Publication date: December 3, 2009Inventors: T. S. Venkatesh, L. Chandrashekar, Prasun Kali Bhattacharya, Prasenjit Bhowmik, C. Srinivasan, Mukesh Khatri, Sanjeeb Kumar Ghosh, Sumanth Chakkirala, Sundararajan Krishnan, Prakash Easwaran
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Publication number: 20070285297Abstract: 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: ApplicationFiled: June 9, 2007Publication date: December 13, 2007Inventors: T. S. Venkatesh, L. Chandrashekar, Prasun Kali Bhattacharya, Prasenjit Bhowmik, C. Srinivasan, Mukesh Khatri, Sanjeeb Kumar Ghosh, Sumanth Chakkirala, Sundararajan Krishnan, Prakash Easwaran
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Publication number: 20040229912Abstract: 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: ApplicationFiled: June 21, 2004Publication date: November 18, 2004Applicant: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Patent number: 6773714Abstract: 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: GrantFiled: February 24, 2003Date of Patent: August 10, 2004Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Patent number: 6630155Abstract: 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: GrantFiled: August 22, 2000Date of Patent: October 7, 2003Assignee: Atrix Laboratories, Inc.Inventors: Bhagya L. Chandrashekar, Mingxing Zhou, Eileen M. Jarr, Richard L. Dunn
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Publication number: 20030133964Abstract: 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: ApplicationFiled: February 24, 2003Publication date: July 17, 2003Applicant: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L. Chandrashekar
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Patent number: 6565874Abstract: 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: GrantFiled: November 13, 2000Date of Patent: May 20, 2003Assignee: Atrix LaboratoriesInventors: Richard L. Dunn, John Steven Garrett, Harish Ravivarapu, Bhagya L Chandrashekar
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Patent number: 6261583Abstract: 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: GrantFiled: July 28, 1998Date of Patent: July 17, 2001Assignee: Atrix Laboratories, Inc.Inventors: Richard L. Dunn, Bhagya L. Chandrashekar, Kathleen A. McEnery
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Patent number: 6143314Abstract: 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: GrantFiled: October 28, 1998Date of Patent: November 7, 2000Assignee: Atrix Laboratories, Inc.Inventors: Bhagya L. Chandrashekar, Mingxing Zhou, Eileen M. Jarr, Richard L. Dunn