Patents by Inventor Paul W. Erhardt

Paul W. Erhardt 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: 20030096858
    Abstract: The present invention describes a method for programming a specific course and rate of metabolism for a parent drug compound that leads to an inactive or very weakly active and nontoxic metabolite when the modified drug compound is administered.
    Type: Application
    Filed: November 18, 2002
    Publication date: May 22, 2003
    Inventor: Paul W. Erhardt
  • Publication number: 20030095992
    Abstract: A method for modifying at least one non-ester-containing parent compound, and the compounds produced using such method, which compounds are deployed to temporarily incapacitate at least one subject are disclosed. The modified compounds are rapidly metabolized to inactive and non-toxic metabolites when exposure to the modified compounds is halted.
    Type: Application
    Filed: November 18, 2002
    Publication date: May 22, 2003
    Inventor: Paul W. Erhardt
  • Patent number: 6255540
    Abstract: A method for producing 2-substituted glycerols having various levels of hydroxy group protection by opening dihydroxyacetone dimer in a nonaqueous, non-protic environment with a composition that initially protects both of the liberated 1,3-dihydroxy groups to form di-ether containing ketone monomers which can then be conveniently subjected to ketone addition reactions and standard chemical functional group manipulations.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: July 3, 2001
    Assignee: The University of Toledo
    Inventors: Paul W. Erhardt, Wieslaw A. Klis
  • Patent number: 5977409
    Abstract: This invention relates to the use of a family of chiral .alpha.-substituted benzylamine reagents during chemical synthesis. Specifically, the reagents can be used in an auxiliary manner to deliver either a substituted or unsubstituted nitrogen atom while simultaneously bestowing an asymmetric bias toward the formation and separation of the diastereomeric intermediates that result from reaction of the reagents with racemic substrates also having one or more asymmetric atoms. The chiral auxiliary portion of the reagents can then be readily removed at some later and convenient stage of the overall synthetic scheme. The initial nitrogen-delivery reaction, asymmetric separation procedures, and removal of the chiral auxiliary can all be conducted under routine experimental conditions, including the final debenzylation, such that the overall method is adaptable to large-scale chemistry.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: November 2, 1999
    Assignee: University of Toledo
    Inventor: Paul W. Erhardt
  • Patent number: 5504070
    Abstract: Novel and known compounds are described which inhibit endothelin converting enzyme (ECE), thereby preventing the conversion of Big Endothelin (BET) to Endothelin (ET). Pharmaceutical usefulness and preparations are described.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: April 2, 1996
    Assignee: Berlex Laboratories, Inc.
    Inventors: Ron H. Bihovsky, Paul W. Erhardt, John W. Lampe, Raju Mohan, Kenneth J. Shaw
  • Patent number: 5416097
    Abstract: This invention relates to novel potassium channel activators and their acid addition salts. The compounds of the invention as potassium channel activators/openers have therapeutic value in a number of physiological areas such as hypertension, cardiac ischemia, cerebral ischemia, broncho constriction and neurodegenerative diseases. Pharmaceutical compositions are proposed for the compounds which are of the following formulae: ##STR1## wherein: R is H or OH;- - - the dotted line at position 3,4 represents the presence or absence of a double bond. ##STR2## the pharmaceutically acceptable acid addition salts thereof, with the provisos that:a) R is H when 3,4 is a double bond; andb) R is OH when 3,4 is a single bond.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: May 16, 1995
    Assignee: Berlex Laboratories, Inc.
    Inventors: Paul W. Erhardt, Kenneth J. Shaw
  • Patent number: 5189036
    Abstract: Novel imidazolybenzoyl substituted heterocycles and their use as cardiovascular agents most especially as Class III antiarrhythmic agents is described. Pharmaceutical formulations containing such compounds are also discussed.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: February 23, 1993
    Assignee: Schering AG
    Inventors: Yuo-Ling Chou, Paul W. Erhardt, Alfred A. Hagedorn, III, John W. Lampe, Lumma, Jr., William C., Thomas K. Morgan, Jay R. Wiggins
  • Patent number: 4906661
    Abstract: Novel compounds of the general formula ##STR1## wherein R.sub.1 is lower alkyl, lower cycloalkyl, lower alkenyl, lower alkynyl, lower alkyl carboxymethyl, aryl carboxymethyl, aryl, or aralkyl; A is a direct bond, lower alkylene, or lower alkenylene; x is 1 or 2, provided that when x is greater than 1, different occurrences of the ##STR2## group may be the same or different; Ar is heterocyclic, unsubstituted aromatic or aromatic substituted with lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, halogen, acetamido, amino, nitro, lower alkylamino, hydroxy, lower hydroxyalkyl or cyano; W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: March 6, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Paul W. Erhardt, William L. Matier
  • Patent number: 4804677
    Abstract: Novel compounds of the general formula ##STR1## wherein R.sub.1 is lower alkyl, lower cycloalkyl, lower alkenyl, lower alkynyl, lower alkyl carboxymethyl, aryl carboxymethyl, aryl, or aralkyl; A is a direct bond, lower alkylene, or lower alkenylene; x is 1 or 2, provided that when x is greater than 1, different occurrences of the ##STR2## group may be the same or different; Ar is heterocyclic unsubstituted aromatic or aromatic substituted with lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, halogen, acetamido, amino, nitro, lower alkylamino, hydroxy, lower hydroxyalkyl or cyano; W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: February 14, 1989
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul W. Erhardt, William L. Matier
  • Patent number: 4743612
    Abstract: Orally active prodrug derivatives of the cardiotonic agent 4-ethyl-1,3-dihydro-5-[4-(2-methyl-1H-imidazol-1-yl)benzoyl]-2H-imidazol-2 -one are disclosed. Pharmaceutical formulations containing such compounds are also provided.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: May 10, 1988
    Assignee: Berlex Laboratories, Inc.
    Inventors: Paul W. Erhardt, Alfred A. Hagedorn, III
  • Patent number: 4737511
    Abstract: Novel imidazolylphenylpyrrol-2-ones are described as having cardiovascular properties especially as cardiotonic agents in the treatment of congestive heart failure. Pharmaceutical formulations containing such compounds are also described.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: April 12, 1988
    Assignee: Schering A.G.
    Inventors: Paul W. Erhardt, Alfred A. Hagedorn, III, John W. Lampe
  • Patent number: 4709043
    Abstract: Novel imidazolonecarbonylarylimidazoles are described having cardiovascular properties, especially as cardiotonic agents in the treatment of congestive heart failure. Pharmaceutical formulations containing such compounds are also provided. Further, a novel process for the preparation of the compounds and intermediates useful thereto of this invention is disclosed.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: November 24, 1987
    Assignee: Schering A.G.
    Inventors: Paul W. Erhardt, Alfred A. Hagedorn, III, William C. Lumma, Jr., Ronald A. Wohl
  • Patent number: 4692446
    Abstract: Novel compounds of the general formula ##STR1## wherein R.sub.1 is lower alkyl, lower cycloalkyl, lower alkenyl, lower alkynyl, lower alkyl carboxymethyl, aryl carboxymethyl, aryl, or aralkyl; A is a direct bond, lower alkylene, or lower alkenylene; x is 1 or 2, provided that when x is greater than 1, different occurrences of the ##STR2## group may be the same or different; Ar is heterocyclic, unsubstituted aromatic or aromatic substituted with lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, halogen, acetamido, amino, nitro, lower alkylamino, hydroxy, lower hydroxyalkyl or cyano; W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: September 8, 1987
    Assignee: E. I. Du Pont de Nemours & Co., Inc.
    Inventors: Paul W. Erhardt, William L. Matier
  • Patent number: 4623652
    Abstract: Novel compounds of the general formula ##STR1## wherein R.sub.1 is lower alkyl, lower cycloalkyl, lower alkenyl, lower alkynyl, lower alkyl carboxymethyl, aryl carboxymethyl, aryl, or aralkyl; A is a direct bond, lower alkylene, or lower alkenylene; x is 1 or 2, provided that when x is greater than 1, different occurrences of the ##STR2## group may be the same or different; Ar is heterocyclic, unsubstituted aromatic or aromatic substituted with lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, halogen, acetamido, amino, nitro, lower alkylamino, hydroxy, lower hydroxyalkyl or cyano; W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.
    Type: Grant
    Filed: January 16, 1985
    Date of Patent: November 18, 1986
    Assignee: American Hospital Supply Corporation
    Inventors: Paul W. Erhardt, William L. Matier
  • Patent number: 4604481
    Abstract: A method for the treatment or prophylaxis of cardiac disorders in a mammal, comprising administering to such mammal a short-acting .beta.-blocking compound of the formula: ##STR1## wherein X is an ester-containing group; R may be lower alkyl, aralkyl or an ester-containing group; R.sub.1 may be lower alkyl; and Ar may be substituted or unsubstituted aromatic; or a pharmaceutically acceptable salt thereof. Novel compounds possessing short acting .beta.-adrenergic blocking activity are also disclosed.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: August 5, 1986
    Assignee: American Hospital Supply Corporation
    Inventors: Sheung-tsam Kam, Paul W. Erhardt, Robert J. Borgman, John P. O'Donnell
  • Patent number: 4593119
    Abstract: A method for the treatment or prophylaxis of cardiac disorders in a mammal, comprising administering to such mammal a short-acting .beta.-blocking compound of the formula: ##STR1## wherein R may be lower alkyl, aryl, or aralkyl; n may be an integer from 0 to about 10; x may be an integer from 1 to 3; Ar may be substituted or unsubstituted aromatic; R.sub.1 may be lower alkyl, or aralkyl; and pharmaceutically accepted salts thereof. Novel compounds possessing short-acting .beta.-adrenergic blocking activity are also disclosed.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: June 3, 1986
    Assignee: American Hospital Supply Corporation
    Inventors: Paul W. Erhardt, Robert J. Borgman, John P. O'Donnell
  • Patent number: 4556665
    Abstract: Novel imidazolonecarbonylarylimidazoles of the formula: ##STR1## are described having cardiovascular properties, especially as cardiotonic agents in the treatment of congestive heart failure. Pharmaceutical formulations containing such compounds are also provided. Further, a novel process for the preparation of the compounds and intermediates useful thereto of this invention is disclosed.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: December 3, 1985
    Assignee: Schering A.G.
    Inventors: Paul W. Erhardt, Alfred A. Hagedorn, III, William C. Lumma, Jr., Ronald A. Wohl
  • Patent number: 4556668
    Abstract: Described herein are compounds of the formula ##STR1## wherein R.sub.1 is alkyl of from 1 to about 5 carbon atoms, alkenyl of from 2 to about 5 carbon atoms, alkynyl of from 3 to about 5 carbon atoms, cycloalkyl of from 3 to about 7 carbon atoms, alkylcarboxymethyl wherein the alkyl portion is from 1 to about 5 carbon atoms, arylcarboxymethyl wherein the aryl portion is from 6 to about 10 carbon atoms, aryl of from 6 to about 10 carbon atoms, or aralkyl wherein the alkyl portion is from 1 to about 5 carbon atoms and the aryl portion is from about 6 to about 10 carbon atoms; R.sub.2 and R.sub.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: December 3, 1985
    Assignee: American Hospital Supply Corporation
    Inventors: Paul W. Erhardt, Chi Woo
  • Patent number: 4508725
    Abstract: Novel compounds are disclosed having the formula ##STR1## wherein R is lower alkyl, lower cycloalkyl, lower haloalkyl, lower alkylcarboxymethyl, arylcarboxymethyl, lower alkenyl, lower alkynyl, aryl having from 6 to about 10 carbon atoms, or aralkyl; R.sub.1 is lower alkyl, lower hydroxyalkyl, lower alkenyl, lower alkynyl, aralkyl, or --WB; where W is alkylene containing from 1 to about 10 carbon atoms; and B is --NR.sub.2 COR.sub.3, --NR.sub.2 CONR.sub.3 R.sub.4, --NR.sub.2 SO.sub.2 R.sub.3, --NR.sub.2 SO.sub.2 NR.sub.3 R.sub.4, or --NR.sub.2 COOR.sub.5, where R.sub.2, R.sub.3, R.sub.4, and R.sub.5 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, alkoxyaryl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.3 and R.sub.5 are not hydrogen when B is --NR.sub.2 SO.sub.2 R.sub.3 or --NR.sub.2 COOR.sub.5, or R.sub.3 and R.sub.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: April 2, 1985
    Assignee: American Hospital Supply Corporation
    Inventors: William L. Matier, Paul W. Erhardt, Ghanshyam Patil
  • Patent number: 4450173
    Abstract: A short-acting .beta.-blocking compound of the formula ##STR1## wherein Ar may be substituted or unsubstituted aromatic, Y may be a straight or branched carbon chain or aralkyl, R may be lower alkyl, lower alkenyl, lower alkynyl, aryl or aralkyl, and x is an integer from 1 to about 3; or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: May 22, 1984
    Assignee: American Hospital Supply Corporation
    Inventors: Paul W. Erhardt, Robert J. Borgman