Patents by Inventor Bakthan Singaram

Bakthan Singaram 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: 20060063196
    Abstract: Targeted molecular bar codes and methods for using the same are provided. The subject targeted molecular bar codes include a molecular bar code and a member of a specific binding pair, where the specific binding pair member is generally bonded to the bar code through a linking group. The subject molecular bar code may be read during translocation through a single nano-meter scale pore. The subject targeted molecular bar codes find use in a variety of different applications involving analyte detection, such as screening and diagnostic applications.
    Type: Application
    Filed: August 13, 2002
    Publication date: March 23, 2006
    Inventors: Mark Akeson, David Deamer, Wenonah Vercoutere, Hugh Olsen, Rebecca Braslau, Bakthan Singaram, Derek Steiner, Frank Cappuccio
  • Publication number: 20040028612
    Abstract: The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vitro and/or in vivo in aqueous media. In particular, a sensory devise is implemented in a mammal to determine sugar levels. Specifically, a dye is combined with a conjugated nitrogen-containing heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen-containing boronic acid substituted compounds. The method is useful to determine sugar levels in a human being.
    Type: Application
    Filed: June 5, 2003
    Publication date: February 12, 2004
    Inventors: Bakthan Singaram, Ritchie A. Wessling
  • Patent number: 6653141
    Abstract: The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vitro in aqueous or organic media. Specifically, a dye is combined with an conjugated nitrogen-containing aromatic heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen containing boronic acid substituted compounds. The method is useful to determine sugar levels in fermentation and process streams.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: November 25, 2003
    Assignee: The Regents of the University of California
    Inventors: Bakthan Singaram, Ritchie A. Wessling
  • Patent number: 6627177
    Abstract: The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vivo in aqueous media. Specifically, a dye is combined with a conjugated nitrogen-containing heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen-containing boronic acid substituted compounds. The method is useful to determine sugar levels in a human being.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: September 30, 2003
    Assignee: The Regents of the University of California
    Inventors: Bakthan Singaram, Ritchie A. Wessling
  • Patent number: 6465193
    Abstract: Targeted molecular bar codes and methods for using the same are provided. The subject targeted molecular bar codes include a molecular bar code and a member of a specific binding pair, where the specific binding pair member is generally bonded to the bar code through a linking group. The subject molecular bar code may be read during translocation through a single nano-meter scale pore. The subject targeted molecular bar codes find use in a variety of different applications involving analyte detection, such as screening and diagnostic applications.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: October 15, 2002
    Assignee: The Regents of the University of California
    Inventors: Mark Akeson, David W. Deamer, Wenonah Vercoutere, Hugh E. Olsen, Rebecca Braslau, Bakthan Singaram, Derek Steiner, Frank Cappuccio
  • Publication number: 20020142344
    Abstract: Targeted molecular bar codes and methods for using the same are provided. The subject targeted molecular bar codes include a molecular bar code and a member of a specific binding pair, where the specific binding pair member is generally bonded to the bar code through a linking group. The subject molecular bar code may be read during translocation through a single nano-meter scale pore. The subject targeted molecular bar codes find use in a variety of different applications involving analyte detection, such as screening and diagnostic applications.
    Type: Application
    Filed: December 10, 1999
    Publication date: October 3, 2002
    Inventors: MARK AKESON, DAVID W. DEAMER, WENONAH VERCOUTERE, HUGH E. OLSEN, REBECCA BRASLAU, BAKTHAN SINGARAM, DEREK STEINER, FRANK CAPPUCCUI
  • Publication number: 20020106810
    Abstract: The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vitro in aqueous or organic media. Specifically, a dye is combined with an conjugated nitrogen-containing aromatic heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen containing boronic acid substituted compounds. The method is useful to determine sugar levels in fermentation and process streams.
    Type: Application
    Filed: December 5, 2000
    Publication date: August 8, 2002
    Inventors: Bakthan Singaram, Ritchie A. Wessling
  • Publication number: 20020106326
    Abstract: The present invention concerns an improved optical method and optical sensing device for determining the levels of polyhydroxyl-substituted organic molecules in vivo in aqueous media. Specifically, a dye is combined with a conjugated nitrogen-containing heterocyclic aromatic boronic acid-substituted bis-onium compound in the presence of a sugar, such as fructose or glucose. The viologens are preferred as the aromatic conjugated nitrogen-containing boronic acid substituted compounds. The method is useful to determine sugar levels in a human being.
    Type: Application
    Filed: December 5, 2000
    Publication date: August 8, 2002
    Inventors: Bakthan Singaram, Ritchie A. Wessling
  • Patent number: 6362373
    Abstract: The disclosed invention comprises a compound having the formula: in which R1 and R2 independently represent a hydrogen or an alkyl group of 4 carbon atoms or greater. Further disclosed is a process for the preparation of the disclosed chiral amino alcohols from a starting amine compound and a limonene oxide.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: March 26, 2002
    Assignees: The Dow Chemical Company
    Inventors: Christian T. Goralski, Bakthan Singaram, William Chrisman
  • Patent number: 5466798
    Abstract: The present invention relates to novel, powerful reducing agents, lithium aminoborohydrides which are prepared by addition of BH.sub.3 .cndot.THF to the corresponding dialkylamine at 25.degree. C. to give the intermediate amineborane complex. Subsequent deprotonation by strong base, e.g. n-BuLi, yields the aminoborohydride quantitatively. Lithium aminoborohydrides are powerful reducing agents, comparable in strength to lithium aluminum hydride. The activity is determined by the dialkylamine. Lithium pyrrolidinoborohydride has unique activity and selectivity in its reducing properties. Esters, lactones and anhydrides are reduced cleanly at 25.degree. C. to give the corresponding alcohols, while carboxylic acids are not reduced. Test reductions show that lithium pyrrolidinoborohydride is also capable of reducing a wide range of functional groups including amides, epoxides, oximes, nitriles and halides.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: November 14, 1995
    Assignee: The Regents of the University of California
    Inventors: Bakthan Singaram, Gary B. Fisher, Joseph C. Fuller, John Harrison, Christian T. Goralski
  • Patent number: 5367073
    Abstract: The present invention relates to a process for the synthesis of chiral enantiomerically pure .beta.-amino alcohols which are extraordinarily important as therapeutic agents for the treatment of a variety of human disorders and as chiral auxiliaries in organic synthesis. The hydroboration of enamines is a versatile and convenient method for the synthesis of both racemic and enantiomerically pure .beta.-amino alcohols in high yields. This methodology enables the synthesis of virtually any .beta.-amino alcohol. Hydroboration of these enamines with chiral organic borohydrides, e.g. either mono- or diisopinocampheylborane, followed by oxidation with aqueous or solid NaOH/30% H.sub.2 O.sub.2 or Me.sub.3 NO, gives the corresponding chiral .beta.-amino alcohol. Enantiomeric excesses ranged from 60% for reactions run at 25.degree. C. to greater than 99% for reactions run at -25.degree. C.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: November 22, 1994
    Assignee: The Regents of the University of California
    Inventors: Bakthan Singaram, Gary B. Fisher, Christian T. Goralski, Lawrence W. Nicholson
  • Patent number: 4895996
    Abstract: Alkenes are prepared by the hydroboration of enamines followed by an elimination reaction to form the alkene. This process has wide applicability and is useful for the stereospecific synthesis of [Z] isomers. It is preferred to use 9-borabicyclo[3.3.1 nonane as the hydroborating agent and to use methanol to catalyze the elimination reaction.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: January 23, 1990
    Assignees: Purdue Research Foundation, The Dow Chemical Company
    Inventors: Christian T. Goralski, Bakthan Singaram, Herbert C. Brown
  • Patent number: 4886924
    Abstract: A process for the stereospecific synthesis of [E] alkenes from enamines comprising the steps of hydroborating the enamine; esterifying the organoborane so formed and oxidizing the boronic ester in the presence of hydrogen peroxide and in the absence of added base under conditions sufficient to form the [E] alkene in high yield.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: December 12, 1989
    Assignee: The Dow Chemical Company
    Inventors: Christian T. Goralski, Bakthan Singaram, Herbert C. Brown