Patents by Inventor Nnochiri Nkem Ekwuribe

Nnochiri Nkem Ekwuribe 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).

  • Patent number: 7151095
    Abstract: Compounds are disclosed having the structure of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: where R5 is selected from the group consisting of hydrogen and C1 to C4 alkyl, or where R6, R7 and R8 are independently hydrogen or C1 to C4 alkyl; or the esters or pharmacologically acceptable salts thereof. Such compounds may be utilized for the prophylaxis or treatment of various diseases, particularly inflammatory conditions of the GI tract. Methods of treating inflammatory conditions of the GI tract such as inflammatory bowel disease using compounds having the following formula are also disclosed: where R9, R10 and R11 are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, and R12 is selected from the group consisting of hydrogen and —C(O)R13, where R13 is a C1 to C6 alkyl or an aryl group.
    Type: Grant
    Filed: October 18, 2004
    Date of Patent: December 19, 2006
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Patent number: 7119119
    Abstract: Compounds are disclosed having the structure of Formula I: where R1 , R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: where R5 is selected from the group consisting of hydrogen and C1 to C4 alkyl, or where R6, R7 and R8 are independently hydrogen or C1 to C4 alkyl; or the esters or pharmacologically acceptable salts thereof. Such compounds may be utilized for the prophylaxis or treatment of various diseases, particularly inflammatory conditions of the GI tract. Methods of treating inflammatory conditions of the GI tract such as inflammatory bowel disease using compounds having the following formula are also disclosed: where R9, R10 and R11 are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, and R12 is selected from the group consisting of hydrogen and —C(O)R13, where R13 is a C1 to C6 alkyl or an aryl group.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: October 10, 2006
    Assignee: Biocon Limited
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Patent number: 7022869
    Abstract: Methods of synthesizing pure enantiomers of acylanalides such as Casodex® (bicalutamide) and its derivatives utilizing a compound having a ring structure that, when opened, provides a substituent having the structure of Formula I: wherein R1 is alkyl or haloalkyl having up to 4 carbons; R2 is alkyl having up to 6 carbon atoms; and R3 is CH2OR4 where R4 is hydrogen or benzyl, C(O)CH3, or C(O)OR5 where R5 is hydrogen or alkyl; are disclosed.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: April 4, 2006
    Assignee: Nobex Corporation
    Inventor: Nnochiri Nkem Ekwuribe
  • Patent number: 6903082
    Abstract: Compounds are disclosed having the structure of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: where R5 is selected from the group consisting of hydrogen and C1 to C4 alkyl, or where R6, R7 and R8 are independently hydrogen or C1 to C4 alkyl; or the esters or pharmacologically acceptable salts thereof. Such compounds may be utilized for the prophylaxis or treatment of various diseases, particularly inflammatory conditions of the GI tract. Methods of treating inflammatory conditions of the GI tract such as inflammatory bowel disease using compounds having the following formula are also disclosed: where R9, R10 and R11 are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, and R12 is selected from the group consisting of hydrogen and —C(O)R13, where R13 is a C1 to C6 alkyl or an aryl group.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: June 7, 2005
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Publication number: 20040152769
    Abstract: Prodrugs having a hydrolyzable carbamate moiety, compositions including the prodrugs, methods of preparing the prodrugs and methods of treatment using the prodrugs are disclosed. The prodrug has the formula DC(X)XR, where D is a biologically active agent, X is O, S or NR′, and R is a moiety that modifies various properties of the biologically active agent. The biologically active agent either includes a functional group such as an amide, thioamide, imide, thioimide, urea, thiourea, carbamate, thiocarbamate, sulfonamide, or sulfonimide group, or includes a hydroxy, amine, carboxylic acid or thiol group that is modified to include such a group. An NH group from the biologically active agent can be coupled to an activated form the C(X)XR moiety to form the prodrugs described herein. Relative to a conventional carbamate group, the presence of the additional carbonyl or sulfonyl group makes the carbamate group more susceptible to hydrolysis.
    Type: Application
    Filed: November 7, 2003
    Publication date: August 5, 2004
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer Riggs-Sauthier, Tatyana A. Dyakonov
  • Patent number: 6730701
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same. In one embodiment the composition is: In another embodiment, the composition is: In yet another embodiment, the composition is: Additional alternative embodiments are R or R″ are therapeutic moieties.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: May 4, 2004
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Patent number: 6713510
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same. In one embodiment the composition is In another embodiment, the composition is Additional alternative embodiments are R or R″ that are therapeutic moieties.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: March 30, 2004
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs
  • Publication number: 20040030130
    Abstract: A method of synthesizing pure enantiomers of acylanalides such as Casodex® (bicalutamide) and its derivatives includes contacting a compound having a ring structure that, when opened, provides a substituent having the structure of Formula I: 1
    Type: Application
    Filed: May 23, 2003
    Publication date: February 12, 2004
    Inventor: Nnochiri Nkem Ekwuribe
  • Publication number: 20030229006
    Abstract: A therapeutic formulation comprising a microemulsion of a therapeutic agent in free and/or conjugatively coupled form, wherein the microemulsion comprises a water-in-oil (w/o) microemulsion including a lipophilic phase and a hydrophilic phase, and has a hydrophilic and lipophilic balance (HLB) value between 3 and 7, wherein the therapeutic agent may for example be selected from the group consisting of insulin, calcitonin, ACTH, glucagon, somatostatin, somatotropin, somatomedin, parathyroid hormone, erythropoietin, hypothalamic releasing factors, prolactin, thyroid stimulating hormones, endorphins, enkephalins, vasopressin, non-naturally occurring opioids, superoxide dismutase, interferon, asparaginase, arginase, arginine deaminease, adenosine deaminase, ribonuclease, trypsin, chymotrypsin, papain, Ara-A (Arabinofuranosyladenine), Acylguanosine, Nordeoxyguanosine, Azidothymidine, Didesoxyadenosine, Dideoxycytidine, Dideoxyinosine Floxuridine, 6-Mercaptopurine, Doxorubicin, Daunorubicin, or I-darubicin, Erythro
    Type: Application
    Filed: May 30, 2003
    Publication date: December 11, 2003
    Inventor: Nnochiri Nkem Ekwuribe
  • Publication number: 20030229010
    Abstract: A therapeutic formulation comprising a microemulsion of a therapeutic agent in free and/or conjugatively coupled form, wherein the microemulsion comprises a water-in-oil (w/o) microemulsion including a lipophilic phase and a hydrophilic phase, and has a hydrophilic and lipophilic balance (HLB) value between 3 and 7, wherein the therapeutic agent may for example be selected from the group consisting of insulin, calcitonin, ACTH, glucagon, somatostatin, somatotropin, somatomedin, parathyroid hormone, erythropoietin, hypothalamic releasing factors, prolactin, thyroid stimulating hormones, endorphins, enkephalins, vasopressin, non-naturally occurring opioids, superoxide dismutase, interferon, asparaginase, arginase, arginine deaminease, adenosine deaminase, ribonuclease, trypsin, chymotrypsin, papain, Ara-A (Arabinofuranosyladenine), Acylguanosine, Nordeoxyguanosine, Azidothymidine, Didesoxyadenosine, Dideoxycytidine, Dideoxyinosine Floxuridine, 6-Mercaptopurine, Doxorubicin, Daunorubicin, or I-darubicin, Erythro
    Type: Application
    Filed: June 2, 2003
    Publication date: December 11, 2003
    Inventor: Nnochiri Nkem Ekwuribe
  • Patent number: 6653348
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same. In one embodiment the composition is In another embodiment, the composition is Additional alternative embodiments are R or R″ that are therapeutic moieties.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: November 25, 2003
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs
  • Publication number: 20030191186
    Abstract: Compounds are disclosed having the structure of Formula I: 1
    Type: Application
    Filed: May 23, 2003
    Publication date: October 9, 2003
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Patent number: 6610739
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same. In one embodiment the composition is In another embodiment, the composition is Additional alternative embodiments are R or R″ that are therapeutic moieties.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: August 26, 2003
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs
  • Patent number: 6593492
    Abstract: A methods of preparing a substantially pure enantiomer of an acylanilide such as Casodex® (bicalutamide) and/or its derivatives includes resolving an intermediate compound having the structure of Formula I: wherein R1 is alkyl or haloalkyl having up to 4 carbons; R2 is alkyl having up to 6 carbon atoms; R3 is a direct link or alkyl having up to 6 carbon atoms; R4 is alkyl, alkenyl, hydroxyalkyl or cycloalkyl each of up to 6 carbons; or R4 is phenyl which bears one, two or three substituents independently selected from hydrogen, halogen, nitro, carboxy, carbamoyl and cyano, and alkyl, alkoxy, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, perfluoroalkyl, perfluoroalkylthio, perfluoroalkylsulphinyl, perfluoroalkylsulphonyl, alkoxycarbonyl and N-alkylcarbamoyl each of up to 4 carbon atoms, and phenyl, phenylthio, phenylsulphinyl and phenylsulphonyl; or R4 is naphthyl; or R4 is a 5- or 6-membered saturated or unsaturated heterocyclic which contains one, two or three heteroatoms sel
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: July 15, 2003
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Kenneth D. James
  • Patent number: 6583306
    Abstract: Methods of synthesizing pure enantiomers of acylanalides such as Casodex® (bicalutamide) and its derivatives utilizing a compound having a ring structure that, when opened, provides a substituent having the structure of Formula I: wherein R1 is alkyl or haloalkyl having up to 4 carbons; R2 is alkyl having up to 6 carbon atoms; and R3 is CH2OR4 where R4 is hydrogen or benzyl, C(O)CH3, or C(O)OR5 where R5 is hydrogen or alkyl; are disclosed. Methods of synthesizing acylanalides such as Casodex® (bicalutamide) and/or derivatives thereof from a starting material of citramalic acid are also provided.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: June 24, 2003
    Assignee: Nobex Corporation
    Inventor: Nnochiri Nkem Ekwuribe
  • Patent number: 6583128
    Abstract: Compounds are disclosed having the structure of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: where R5 is selected from the group consisting of hydrogen and C1 to C4 alkyl, or where R6, R7 and R8 are independently hydrogen or C1 to C4 alkyl; or the esters or pharmacologically acceptable salts thereof. Such compounds may be utilized for the prophylaxis or treatment of various diseases, particularly inflammatory conditions of the GI tract. Methods of treating inflammatory conditions of the GI tract such as inflammatory bowel disease using compounds having the following formula are also disclosed: where R9, R10 and R11 are independently selected from the group consisting of hydrogen and C1 to C4 alkyl, and R12 is selected from the group consisting of hydrogen and —C(O)R13, where R13 is a C1 to C6 alkyl or an aryl group.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: June 24, 2003
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Publication number: 20030100606
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same.
    Type: Application
    Filed: October 29, 2002
    Publication date: May 29, 2003
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Patent number: 6552078
    Abstract: The present invention provides compositions useful for the treatment of inflammation in humans, and related methods of treatment for the same. In one embodiment the composition is In another embodiment, the composition is In yet another embodiment, the composition is Additional alternative embodiments are R or R″ are therapeutic moieties.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: April 22, 2003
    Inventors: Nnochiri Nkem Ekwuribe, Jennifer A. Riggs-Sauthier
  • Publication number: 20030069309
    Abstract: The present invention provides therapeutically effective amounts of 6MNA prodrugs.
    Type: Application
    Filed: June 12, 2002
    Publication date: April 10, 2003
    Inventors: Nnochiri Nkem Ekwuribe, Tatyana A. Dyakonov
  • Patent number: 6525098
    Abstract: The present invention provides therapeutically effective amounts of 6MNA prodrugs. The pharmaceutical composition comprises wherein R is H or COR′, wherein R′ is selected from the group consisting of C1 to C6 alkyl, (CH2)m O(CH2)n, (CH2)m(OC2H4)p O(CH2)n, (CH2)m(OC2H4)p, (OCH2H4)p ONO2 and (OCH2H4)p O(CH2)n wherein m is an integer from 2 to 4, and n and p are integers from 1 to 4. Alternatively, R is a therapeutic moiety.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: February 25, 2003
    Assignee: Nobex Corporation
    Inventors: Nnochiri Nkem Ekwuribe, Tatyana A. Dyakonov