Patents by Inventor Robert H. K. Chen

Robert H. K. Chen 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: 7691844
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, wherein A, X, n, R1, R2, R3, R4, R5, a and b are as described in the specification, which are useful as vasopressin receptor antagonists for treating conditions associated with vasopressin receptor activity such as those involving increased vascular resistance and cardiac insufficiency. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, renal vasospasm, renal failure, cerebral edema and ischemia, stroke, thrombosis, or water retention are also disclosed.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: April 6, 2010
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Robert H. K. Chen, Min A. Xiang
  • Patent number: 7365062
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, wherein A, X, n, R1, R2, R3, R4, R5, a and b are as described in the specification, which are useful as vasopressin receptor antagonists for treating conditions associated with vasopressin receptor activity such as those involving increased vascular resistance and cardiac insufficiency. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, renal vasospasm, renal failure, cerebral edema and ischemia, stroke, thrombosis, or water retention are also disclosed.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: April 29, 2008
    Assignee: Ortho McNeil Pharmaceutical, Inc.
    Inventors: Robert H. K. Chen, Min A. Xiang
  • Patent number: 7238687
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, wherein A, X, n, R1, R2, R3, R4, R5, a and b are as described in the specification, which are useful as vasopressin receptor antagonists for treating conditions associated with vasopressin receptor activity such as those involving increased vascular resistance and cardiac insufficiency. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, renal vasospasm, renal failure, cerebral edema and ischemia, stroke, thrombosis, or water retention are also disclosed.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: July 3, 2007
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Robert H. K. Chen, Min A. Xiang
  • Patent number: 7001898
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, wherein A, X, n, R1, R2, R3, R4, R5, a and b are as described in the specification, which are useful as vasopressin receptor antagonists for treating conditions associated with vasopressin receptor activity such as those involving increased vascular resistance and cardiac insufficiency. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, renal vasospasm, renal failure, cerebral edema and ischemia, stroke, thrombosis, or water retention are also disclosed.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: February 21, 2006
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Robert H. K. Chen, Min A. Xiang
  • Publication number: 20030045517
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, 1
    Type: Application
    Filed: July 2, 2001
    Publication date: March 6, 2003
    Inventors: Robert H.K. Chen, Min A. Xiang
  • Patent number: 6489321
    Abstract: The invention is directed to nonpeptide substituted benzodiazepines of Formula I, wherein A, X, Z, Bp, W, n, R1 and R2 are as described in the specification, which are useful as vasopressin receptor antagonists for treating conditions involving increased vascular resistance and cardiac insufficiency. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, renal vasospasm, renal failure, cerebral edema and ischemia, stroke, thrombosis, or water retention are also disclosed.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: December 3, 2002
    Assignee: Ortho-McNeil Pharmaceutical, Inc.
    Inventors: Maud J. Urbanski, Robert H. K. Chen
  • Patent number: 5208327
    Abstract: This invention relates to a novel process for preparing 2-chloro-2'-deoxyadenosine (2-CdA) having the following formula ##STR1## from a compound of the following formula ##STR2## The invention also relates to intermediates which are useful in preparing 2-CdA. The compound 2-CdA is useful as an antileukemic agent, i.e., in treating leukemias, such as hairy cell leukemia.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: May 4, 1993
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4479964
    Abstract: Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: October 30, 1984
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Ramesh M. Kanojia, Michael P. Wachter, Robert H. K. Chen
  • Patent number: 4408060
    Abstract: Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: October 4, 1983
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Ramesh M. Kanojia, Michael P. Wachter, Robert H. K. Chen
  • Patent number: 4237054
    Abstract: A method for the total synthesis of (1RS,4SR,5RS)-4-(4,8-dimethyl-5-hydroxy-7-nonenyl)-4-methyl-3,8-dioxabicyc lo [3.2.1] octane-1-acetic acid is described. The compound is active as a utero-evacuant agent.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: December 2, 1980
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4222937
    Abstract: A method of synthesizing 2S*, 3R*-6E-(2-hydroxyethylidene)-2-methyl-2-(4,8-dimethyl-5-oxo-7-nonenyl)-oxe pan-3-ol, one of the active ingredients in the zoapatle plant, is described. The natural product is useful as a utero-evacuant agent.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: September 16, 1980
    Assignee: Ortho Pharmaceutical Corp.
    Inventor: Robert H. K. Chen
  • Patent number: 4221717
    Abstract: A method of synthesizing 2S*, 3R*-6E-(2-hydroxyethylidene)-2-methyl-2-(4,8-dimethyl-5-oxo-7-nonenyl)-oxe pan-3-ol, one of the active ingredients in the zoapatle plant, is described. The active ingredients in the plant are useful as utero-evacuant agents.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: September 9, 1980
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4215048
    Abstract: A method for the total synthesis of (1RS,4SR,5RS)-4-(4,8-dimethyl-5-hydroxy-7-nonenyl)-4-methyl-3,8-dioxabicyc lo[3.2.1]octane-1-acetic acid is described. The compound is active as a utero-evacuant agent.
    Type: Grant
    Filed: May 18, 1979
    Date of Patent: July 29, 1980
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Robert H. K. Chen, Zoltan G. Hajos
  • Patent number: 4182717
    Abstract: A method of synthesizing 2S*,3R*-6E-(2-hydroxyethylidene)-2-methyl-2-(4,8-dimethyl-5-oxo-7-nonenyl) -oxepan-3-ol, one of the active ingredients in the zoapatle plant, is described. The active ingredients in the plant are useful as utero-evacuant agents.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: January 8, 1980
    Assignee: Ortho Pharmaceutical Corp.
    Inventor: Robert H. K. Chen
  • Patent number: 4177194
    Abstract: A method of synthesizing 2S*, 3R*-6E-(2-hydroxyethylidene)-2-methyl-2-(4,8-dimethyl-5-oxo-7-nonenyl)-oxe pan-3-ol, one of the active ingredients in the zoapatle plant, is described. The natural product is useful as a utero-evacuant agent.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: December 4, 1979
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4176188
    Abstract: Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: November 27, 1979
    Assignee: Ortho Pharmaceutical Corp.
    Inventors: Ramesh M. Kanojia, Michael P. Wachter, Robert H. K. Chen
  • Patent number: 4127651
    Abstract: A method of obtaining uteroevacuant substances from the zoapatle plant is described. The isolation and purification of biologically-active compounds from the zoapatle plant is accomplished by chemical means.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: November 28, 1978
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Robert H. K. Chen, Ramesh M. Kanojia
  • Patent number: 4112079
    Abstract: A method of obtaining uteroevacuant substances from the zoapatle plant is described. The isolation and purification of biologically-active compounds from the zoapatle plant is accomplished by chemical means.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: September 5, 1978
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4112078
    Abstract: A method of obtaining uteroevacuant substances from the zoapatle plant is described. The isolation and purification of biologically-active compounds from the zoapatle plant is accomplished by chemical means.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: September 5, 1978
    Assignee: Ortho Pharmaceutical Corporation
    Inventor: Robert H. K. Chen
  • Patent number: 4102895
    Abstract: Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.
    Type: Grant
    Filed: November 18, 1976
    Date of Patent: July 25, 1978
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Ramesh M. Kanojia, Michael P. Wachter, Robert H. K. Chen