Patents by Inventor Shekhar Viswanath

Shekhar Viswanath 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: 20120028908
    Abstract: A process for preparing a crystalline rapamycin analog includes: combining the rapamycin analog with an organic medium to form a mixture; incubating the mixture until the rapamycin analog crystallizes; and recovering the crystalline rapamycin analog. The organic medium can be a solvent, and the process can include causing the rapamycin analog to dissolve into the solvent, and incubating the solvent until the rapamycin analog crystallizes. The following can also be performed: forming a slurry of crystalline rapamycin analog; stirring the rapamycin analog mixture until the rapamycin analog crystallizes; saturating the rapamycin analog solution; forming a supersaturated rapamycin analog solution; combining an antisolvent with the rapamycin analog and the solvent to form a biphasic mixture, and incubating the biphasic mixture to cause a liquid-liquid phase split.
    Type: Application
    Filed: October 1, 2011
    Publication date: February 2, 2012
    Applicant: Abbott Laboratories
    Inventors: Shekhar VISWANATH, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Patent number: 8034926
    Abstract: A process for preparing a crystalline rapamycin analog includes: combining the rapamycin analog with an organic medium to form a mixture; incubating the mixture until the rapamycin analog crystallizes; and recovering the crystalline rapamycin analog. The organic medium can be a solvent, and the process can include causing the rapamycin analog to dissolve into the solvent, and incubating the solvent until the rapamycin analog crystallizes. The following can also be performed: forming a slurry of crystalline rapamycin analog; stirring the rapamycin analog mixture until the rapamycin analog crystallizes; saturating the rapamycin analog solution; forming a supersaturated rapamycin analog solution; combining an antisolvent with the rapamycin analog and the solvent to form a biphasic mixture, and incubating the biphasic mixture to cause a liquid-liquid phase split.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: October 11, 2011
    Assignee: Abbott Laboratories
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Patent number: 8030326
    Abstract: Provided is a rapamycin analog composition including a crystalline form of a rapamycin analog. The crystal can be a hydrate. dehydrate, solvate, or desolvate.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: October 4, 2011
    Assignee: Abbott Laboratories
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Publication number: 20110009325
    Abstract: Provided is a rapamycin analog composition including a crystalline form of a rapamycin analog. The crystal can be a hydrate. dehydrate, solvate, or desolvate.
    Type: Application
    Filed: September 20, 2010
    Publication date: January 13, 2011
    Applicant: Abbott Laboratories
    Inventors: SHEKHAR VISWANATH, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Publication number: 20110009618
    Abstract: A process for preparing a crystalline rapamycin analog includes: combining the rapamycin analog with an organic medium to form a mixture; incubating the mixture until the rapamycin analog crystallizes; and recovering the crystalline rapamycin analog. The organic medium can be a solvent, and the process can include causing the rapamycin analog to dissolve into the solvent, and incubating the solvent until the rapamycin analog crystallizes. The following can also be performed: forming a slurry of crystalline rapamycin analog; stirring the rapamycin analog mixture until the rapamycin analog crystallizes; saturating the rapamycin analog solution; forming a supersaturated rapamycin analog solution; combining an antisolvent with the rapamycin analog and the solvent to form a biphasic mixture, and incubating the biphasic mixture to cause a liquid-liquid phase split.
    Type: Application
    Filed: September 20, 2010
    Publication date: January 13, 2011
    Applicant: Abbott Laboratories
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Patent number: 7820812
    Abstract: A process for preparing a crystalline rapamycin analog includes: combining the rapamycin analog with an organic medium to form a mixture; incubating the mixture until the rapamycin analog crystallizes; and recovering the crystalline rapamycin analog. The organic medium can be a solvent, and the process can include causing the rapamycin analog to dissolve into the solvent, and incubating the solvent until the rapamycin analog crystallizes. The following can also be performed: forming a slurry of crystalline rapamycin analog; stirring the rapamycin analog mixture until the rapamycin analog crystallizes; saturating the rapamycin analog solution; forming a supersaturated rapamycin analog solution; combining an antisolvent with the rapamycin analog and the solvent to form a biphasic mixture, and incubating the biphasic mixture to cause a liquid-liquid phase split.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: October 26, 2010
    Assignee: Abbott Laboratories
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Patent number: 7812032
    Abstract: A rapamycin analog composition includes a crystalline form of a rapamycin analog. The crystal can be a hydrate, dehydrate, solvate, or desolvate.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: October 12, 2010
    Assignee: Abbott Laboratories
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Publication number: 20080091008
    Abstract: A process for preparing a crystalline rapamycin analog includes: combining the rapamycin analog with an organic medium to form a mixture; incubating the mixture until the rapamycin analog crystallizes; and recovering the crystalline rapamycin analog. The organic medium can be a solvent, and the process can include causing the rapamycin analog to dissolve into the solvent, and incubating the solvent until the rapamycin analog crystallizes. The following can also be performed: forming a slurry of crystalline rapamycin analog; stirring the rapamycin analog mixture until the rapamycin analog crystallizes; saturating the rapamycin analog solution; forming a supersaturated rapamycin analog solution; combining an antisolvent with the rapamycin analog and the solvent to form a biphasic mixture, and incubating the biphasic mixture to cause a liquid-liquid phase split.
    Type: Application
    Filed: July 23, 2007
    Publication date: April 17, 2008
    Applicant: ABBOTT LABORATORIES
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Publication number: 20080085880
    Abstract: A rapamycin analog composition includes a crystalline form of a rapamycin analog. The crystal can be a hydrate, dehydrate, solvate, or desolvate.
    Type: Application
    Filed: July 23, 2007
    Publication date: April 10, 2008
    Applicant: ABBOTT LABORATORIES
    Inventors: Shekhar Viswanath, Larry Bartelt, Robert Leanna, Michael Rasmussen, Madhup Dhaon, Rodger Henry, Thomas Borchardt, Shuang Chen, Geoff Zhang
  • Patent number: 7057049
    Abstract: This invention is directed generally to a process for making substituted pyrazoles, tautomers of the substituted pyrazoles, and salts of the substituted pyrazoles and tautomers. The substituted pyrazoles correspond in structure to Formula (I): wherein R3A, R3B, R3C, Y1, Y2, Y3, Y4, and Y5 are as defined in the specification.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: June 6, 2006
    Assignee: Pharmacia Corporation
    Inventors: Kimberley C. Allen, Dennis K. Anderson, John E. Baldus, Todd Boehlow, Jerry D. Clark, Dan R. Dukesherer, Albert D. Edney, Tom Fevig, Sastry Kunda, Jon P. Lawson, Patrick H. Lau, Lisa L. McDermott, Michael K. Mao, Jodi L. Moe, Partha Mudipalli, Win Naing, Shaun R. Selness, Christine B. Seymour, Tobin C. Schilke, Shekhar Viswanath, John K. Walker, Gopichand Yalamanchili
  • Patent number: 6897318
    Abstract: This invention is directed generally to a process for making substituted pyrazoles, tautomers of the substituted pyrazoles, and salts of the substituted pyrazoles and tautomers. The substituted pyrazoles correspond in structure to Formula (I): wherein R3A, R3B, R3C, Y1, Y2, Y3, Y4, and Y5 are as defined in the specification.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: May 24, 2005
    Assignee: Pharmacia Corporation
    Inventors: Kimberly K. Allen, Dennis K. Anderson, John E. Baldus, Jerry D. Clark, Albert D. Edeny, Patrick H. Lau, Daniel R. Dukesherer, Lisa McDermott, Michael K. Mao, Gopi Yalamanchili, Jodi L. Moe, Partha Mudipalli, Win Naing, Shaun R. Selness, Christine Seymour, Shekhar Viswanath, John K. Walker
  • Publication number: 20030225108
    Abstract: This invention is directed generally to a process for making substituted pyrazoles, tautomers of the substituted pyrazoles, and salts of the substituted pyrazoles and tautomers.
    Type: Application
    Filed: April 1, 2003
    Publication date: December 4, 2003
    Inventors: Kimberley C. Allen, Dennis K. Anderson, John E. Baldus, Todd Boehlow, Jerry D. Clark, Daniel R. Dukesherer, Albert D. Edney, Tom Fevig, Sastry Kundra, Jon P. Lawson, Patrick H. Lau, Lisa L. McDermott, Michael K. Mao, Jodi L. Moe, Partha Mudipalli, Win Naing, Shaun R. Selness, Christine B. Seymour, Tobin C. Schilke, Shekhar Viswanath, John K. Walker, Gopichand Yalamanchili
  • Publication number: 20030144302
    Abstract: This invention is directed generally to a process for making substituted pyrazoles, tautomers of the substituted pyrazoles, and salts of the substituted pyrazoles and tautomers.
    Type: Application
    Filed: September 25, 2002
    Publication date: July 31, 2003
    Inventors: Kimberly K. Allen, Dennis K. Anderson, John E. Baldus, Jerry D. Clark, Albert D. Edeny, Patrick H. Lau, Dan R. Dukesherer, Lisa McDermott, Michael K. Mao, Gopi Yalamanchili, Jodi L. Moe, Partha Mudipalli, Win Naing, Shaun R. Selness, Christine Seymour, Shekhar Viswanath, John K. Walker
  • Publication number: 20030087422
    Abstract: Pure bacterial cultures for the production of formylphosphonic acid (FPA) by the oxidation of hydroxymethylphosphonic acid (HMPA) are provided. The cultures can be used to bioremediate HMPA contaminated wastewater or soil, or can be used to produce biogenic FPA for subsequent use. The production of glyphosate from biogenic FPA is described.
    Type: Application
    Filed: July 15, 2002
    Publication date: May 8, 2003
    Applicant: Monsanto Technology LLC.
    Inventors: Michael A. Heitkamp, B. Mason Hughes, Shekhar Viswanath