Patents by Inventor Richard R. Tidwell

Richard R. Tidwell 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: 5723288
    Abstract: Disclosed is a method of fluorescent detection of a nucleic acid. The method comprises contacting to the nucleic acid a bis-dicationic aryl furan compound, such as 2,5-bis?4-(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl) phenyl! furan; 2,5-bis{?4-(N-isopropyl) amidino! phenyl}furan; and physiologically acceptable salts thereof, and exposing the nucleic acid to light at a frequency to induce fluorescence of the compound. A method for fluorescent detection of cytoskeleton elements, and novel bis-dicationic aryl furan compounds are also disclosed.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: March 3, 1998
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: Christine C. Dykstra, Richard R. Tidwell, David W. Boykin, W. David Wilson, Jaroslaw Spychala, Bijan P. Das, Arvind Kumar
  • Patent number: 5686456
    Abstract: The present invention provides methods for treating Pneumocystis carinii pneumonia in a subject in need of such treatment. The methods comprise administering to a subject in need thereof, a pyrimidine of Formula I. ##STR1## wherein the variables are as defined in the specification.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: November 11, 1997
    Assignees: The University of North Carolina, Georgia State University Research Foundation, Inc., Auburn University
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar
  • Patent number: 5667975
    Abstract: Disclosed is a method of fluorescent detection of a nucleic acid. The method comprises contacting to the nucleic acid a bis-dicationic aryl furan and exposing the nucleic acid to light at a frequency to induce fluorescence of the compound. A method for fluorescent detection of cytoskeleton elements, and novel bis-dicationic aryl furan compounds are also disclosed.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 16, 1997
    Assignee: The University of North Carolina
    Inventors: Christine C. Dykstra, Richard R. Tidwell, David W. Boykin, W. David Wilson
  • Patent number: 5668167
    Abstract: The present invention provides methods for treating Cryptococcus neoformans, Cryptosporidium parvum, and Candida albicans in a subject in need of such treatment. The methods comprises administering to the subject a compound of Formula I: ##STR1## wherein: X is located in the para or meta positions and is loweralkyl, loweralkoxy, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, alkylaryl, halogen, or ##STR2## wherein: each R.sub.2 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.2 groups together represent C.sub.2 -C.sub.10 alkylene, or two R.sub.2 groups together represent ##STR3## wherein m is from 1-3 and R.sub.4 is H, ##STR4## or --CONHR.sub.5 NR.sub.6 R.sub.7, whereinR.sub.5 is loweralkyl, R.sub.6 and R.sub.7 are each independently selected from the group consisting of H and lower alkyl; each R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 16, 1997
    Assignees: Duke University, Auburn University, Georgia State University, The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, James E. Hall, David W. Boykin, Christine C. Dykstra, John Perfect, Byron L. Blagburn
  • Patent number: 5668166
    Abstract: The present invention provides methods for treating Pneumocystis carinii pneumonia. The method comprises administering to the subject a compound of Formula I: ##STR1## wherein: X is located in the para or meta positions and is loweralkyl, loweralkoxy, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, alkylaryl, halogen, or ##STR2## wherein: each R.sub.2 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.2 groups together represent C.sub.2 -C.sub.10 alkylene, or two R.sub.2 groups together represent ##STR3## wherein m is from 1-3 and R.sub.4 is H, ##STR4## or --CONHR.sub.5 NR.sub.6 R.sub.7, wherein R.sub.5 is loweralkyl, R.sub.6 and R.sub.7 are each independently selected from the group consisting of H and lower alkyl; each R.sub.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 16, 1997
    Assignees: Georgia State University Research Foundation, Inc., The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, James E. Hall, David W. Boykin
  • Patent number: 5643935
    Abstract: The present invention provides methods for treating Cryptococcus neoformans and Candida albicans in a subject in need of such treatment. The methods comprises administering to the subject a dicationic bis-benzimidazole in an amount effective to treat the conditions.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 1, 1997
    Assignees: The University of North Carolina at Chapel Hill, Duke University, Georgia State University Research Foundation, Inc.
    Inventors: Christine C. Dykstra, John Perfect, David W. Boykin, W. David Wilson, Richard R. Tidwell
  • Patent number: 5639755
    Abstract: The present invention provides methods for treating Cryptococcus neoformans and Candida albicans in a subject in need of such treatment. The methods comprises administering to the subject a dicationic bis-benzimidazole in an amount effective to treat the conditions.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: June 17, 1997
    Assignees: University of North Carolina, Duke University, Georgia State Univ. Research Foundation
    Inventors: Christine C. Dykstra, John Perfect, David W. Boykin, W. David Wilson, Richard R. Tidwell
  • Patent number: 5627184
    Abstract: The present invention provides methods for treating Pneumocystis carinii pneumonia and Giardia lamblia in a subject in need of such treatment. The methods comprises administering to the subject a compound of Formula I: ##STR1## wherein: X and Y are located in the para or meta positions and are selected from the group consisting of H, loweralkyl, loweralkoxy, and ##STR2## wherein: each R.sub.1 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.1 groups together represent C.sub.2 -C.sub.10 alkyl, hydroxyalkyl, or alkylene, or two R.sub.1 groups together represent ##STR3## wherein m is from 1-3 and R.sub.7 is H or --CONHCR.sub.8 NR.sub.9 R.sub.10, wherein R.sub.8 is loweralkyl, and R.sub.9 and R.sub.10 are each independently selected from the group consisting of H and lower alkyl;R.sub.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: May 6, 1997
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar
  • Patent number: 5622955
    Abstract: The present invention provides methods for treating Cryptosporidium parvum in a subject in need of such treatment.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: April 22, 1997
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc., Auburn University
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar, Byron L. Blagburn
  • Patent number: 5606058
    Abstract: The present invention provides compounds useful for treating Pneumocystis carinii pneumonia, Giardia lamblia, and Cryptosporidium parvum in a subject in need of such treatment.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 25, 1997
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar
  • Patent number: 5602172
    Abstract: The present invention provides methods for treating Pneumocystis carinii pneumonia, Giardia lamblia, and Cryptosporidium parvum in a subject in need of such treatment. The methods comprise adminstering to the subject a compound of Formula (I): ##STR1## wherein: R.sub.1 and R.sub.2 are each independently selected from the group consisting of H, loweralkyl, aryl, alkylaryl, aminoalkyl, aminoaryl, halogen, oxyalkyl, oxyaryl, or oxyarylalkyl;R.sub.3 and R.sub.4 are each independently selected from the group consisting of H, loweralkyl, oxyalkyl, alkylaryl, aryl, oxyaryl, aminoalkyl, aminoaryl, or halogen; andX and Y are located in the para or meta positions and are selected from the group consisting of H, loweralkyl, oxyalkyl, and ##STR2## wherein: each R.sub.5 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.5 groups together represent C.sub.2 -C.sub.10 alkyl, hydroxyalkyl, or alkylene; andR.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: February 11, 1997
    Assignees: The University of North Carolina at Chapel Hill, Auburn University, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar, Byron L. Blagburn
  • Patent number: 5594138
    Abstract: Disclosed is a method of fluorescent detection of a nucleic acid. The method comprises contacting to the nucleic acid a bis-dicationic aryl furan compound, such as 2,5-bis[4-(4,5,6,7-tetrahydro-1H-1,3-diazepin-2-yl) phenyl] furan; 2,5-bis{[4-(N-isopropyl) amidino] phenyl}furan; and physiologically acceptable salts thereof, and exposing the nucleic acid to light at a frequency to induce fluorescence of the compound. A method for fluorescent detection of cytoskeleton elements, and novel bis-dicationic aryl furan compounds are also disclosed.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: January 14, 1997
    Assignees: Georgia State University Research Foundation, The University of North Carolina at Chapel Hill
    Inventors: Christine C. Dykstra, Richard R. Tidwell, David W. Boykin, W. David Wilson, Jaroslaw Spychala, Bijan P. Das, Arvind Kumar
  • Patent number: 5578631
    Abstract: Disclosed is a method of combating Pneumocystis carinii Pneumonia in a subject in need of such treatment. The method comprises administering to to the subject an effective Pneumocystis carinii-combating amount of a bis-benzimidazole compound such as bis[5-(2-imidazolyl)-2-benzimidazolyl]methane, 1,4-bis[5-2-imidazolyl)-2-benzimidazolyl]butane, or a pharmaceutically acceptable salt thereof. Pharmaceutical formulations for carrying out the method and novel compounds are also disclosed, along with methods of combating Giardia lamblia.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: November 26, 1996
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, Christine C. Dykstra, James E. Hall
  • Patent number: 5521189
    Abstract: The present invention provides methods for treating Pneumocystis carinii pneumonia and Giardia lamblia in a subject in need of such treatment. The methods comprises administering to the subject a compound of Formula I: ##STR1## wherein: X and Y are located in the para or meta positions and are selected from the group consisting of H, loweralkyl, loweralkoxy, and ##STR2## wherein: each R.sub.1 is independently selected from the group consisting of H, loweralkyl, alkoxyalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, cycloalkyl, aryl, or alkylaryl or two R.sub.1 groups together represent C.sub.2 -C.sub.10 alkyl, hydroxyalkyl, or alkylene, or two R.sub.1 groups together represent ##STR3## wherein m is from 1-3 and R.sub.7 is H or --CONHCR.sub.8 NR.sub.9 R.sub.10.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: May 28, 1996
    Assignee: The University of NC at CH
    Inventors: David W. Boykin, Christine C. Dykstra, Richard R. Tidwell, James E. Hall, W. David Wilson, Arvind Kumar
  • Patent number: 5428051
    Abstract: Disclosed is a method of combating Pneumocystis carinii Pneumonia in a subject in need of such treatment. The method comprises administering to the subject an effective Pneumocystis carinii-combating amount of a bis-benzimidazole compound such as bis[5-(2-imidazolyl)-2-benzimidazolyl]methane, 1,4-bis[5-2-imidazolyl)-2-benzimidazolyl]butane, or a pharmaceutically acceptable salt thereof. Pharmaceutical formulations for carrying out the method and novel compounds are also disclosed, along with methods of combating Giardia lamblia.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: June 27, 1995
    Assignee: University of North Carolina
    Inventors: Richard R. Tidwell, Christine C. Dykstra, James E. Hall
  • Patent number: 5206236
    Abstract: A method for treating malaria which comprises to an afflicted host patient a therapeutically effective amount of a compound have the structure of formula I: ##STR1## wherein X is O or NH; R.sub.1 is H or two R.sub.1 groups on the same amidine group together represents --(CH.sub.2).sub.m --, wherein m=2, 3 or 4; R.sub.2 is H, NH.sub.2, Cl, NO.sub.2 ; R.sub.3 is H, CH.sub.3 or CH.sub.2 CH.sub.3 and n=2-6 or a pharmaceutically acceptable salt thereof provided that when X is O, both R.sub.2 and both R.sub.3 can not be H.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: April 27, 1993
    Inventors: Richard R. Tidwell, J. Dieter Geratz, James E. Hall, Dennis E. Kyle, Max Grogl, Kwasi A. Ohemeng
  • Patent number: 5202320
    Abstract: This invention relates to a method for treating leishmaniasis which comprises administering to an afflicted host patient, a therapeutically effective amount of a compound having the following structure; ##STR1## wherein X is O or NH; R.sub.1 is H or two R.sub.1 of the same amidine group together represent --(CH.sub.2).sub.m -- wherein m=2, 3 or 4; R.sub.2 is H, NH.sub.2, OCH.sub.3, Cl or NO.sub.2 ; R.sub.3 is H, CH.sub.3 or CH.sub.2 CH.sub.3 and n=2-6 or a pharmaceutical acceptable salt thereof provided that X is O both R.sub.2 and both R.sub.3 cannot be H.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: April 13, 1993
    Inventors: Richard R. Tidwell, J. Dieter Geratz, James E. Hall, Dennis E. Kyle, Max Grogl, Kwasi A. Ohemeng
  • Patent number: 4963589
    Abstract: This invention relates to a method for treating giardiasis with an aromatic diamidine compound.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: October 16, 1990
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, Dieter J. Geratz, Kwasi A. Ohemeng
  • Patent number: 4940723
    Abstract: A method of treating arthritis, and/or bone marrow hyperplasia, osteitis and synovitis, and/or granulomatosis including of the liver and spleen, which comprises administering to a patient an effective amount of BABIM and a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: July 10, 1990
    Assignee: University of North Carolina, Chapel Hill
    Inventors: Richard R. Tidwell, Joachim D. Geratz, John H. Schwab, Katherine B. Pryzwansky, Sonia K. Anderle
  • Patent number: 4933347
    Abstract: Certain new diamidine and bis(imidazoline) compounds having activity against Pneumocystis carinii pneumonia are disclosed along with formulations and methods for treating Pneumocystis carinii pneumonia employing said compounds.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: June 12, 1990
    Assignee: University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, Dieter J. Geratz, Kwasi A. Ohemeng, James E. Hall