Patents by Inventor Wolfhard Engel

Wolfhard Engel 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: 4233299
    Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, methyl or ethyl;R.sub.2 is methyl, ethyl or n-propyl; andY is hydrogen, methyl, methoxy, fluorine or chlorine;and non-toxic, pharmacologically acceptable salts thereof formed with an inorganic or organic base. The compounds as well as their salts are useful as antiphlogistics.
    Type: Grant
    Filed: December 6, 1978
    Date of Patent: November 11, 1980
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Gunter Trummlitz, Wolfhard Engel, Ernst Seeger, Gunther Engelhardt
  • Patent number: 4137313
    Abstract: Compounds of the formula ##STR1## WHEREIN R.sub.1 is hydrogen, methyl or ethyl;R.sub.2 is methyl or ethyl;Y is hydrogen, fluorine, chlorine, bromine, methoxy, methyl, ethyl or trifluoromethyl; andAr is 2-thiazolyl which may have one or two methyl or ethyl substituents attached thereto; 5,6-dihydro-4H-cyclopentathiazol-2-yl; 4,5,6,7-tetrahydro-2-benzothiazolyl; 2-benzothiazolyl; 3-isothiazolyl which may have a methyl substituent attached thereto; 2-pyridyl which may have a methyl or hydroxyl substituent attached thereto; 3-pyridyl; 4-pyridyl; 4-pyrimidinyl; pyrazinyl; 2-benzimidazolyl; 2-oxazolyl which may have a methyl substituent attached thereto; 2-benzoxazolyl; or phenyl which may have a fluoro, chloro, bromo, methyl, ethyl, trifluoromethyl or methoxy substituent attached thereto; and non-toxic, pharmacologically acceptable salts thereof formed with inorganic or organic bases. The compounds as well as their salts are useful as antiphlogistics and blood platelet aggregation inhibitors.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: January 30, 1979
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Gunter Trummlitz, Wolfhard Engel, Ernst Seeger, Walter Haarmann, Gunther Engelhardt
  • Patent number: 4021479
    Abstract: Compounds of the formulas ##STR1## and ##STR2## wherein A is --CH.sub.2 -- or --CH(OH)--,R.sub.1 is hydrogen, halogen or, when R.sub.2 and R.sub.3 are other than both hydrogen, also methyl,R.sub.2 is hydrogen, halogen, cyano, nitro, amino or (alkanoyl of 1 to 4 carbon atoms)-amino,R.sub.3 is hydrogen or halogen,Provided, however, that at least one of R.sub.1, R.sub.2 and R.sub.3 is other than hydrogen, andR.sub.4 is hydrogen or alkyl of 1 to 4 carbon atoms, and non-toxic salts of the free acids (R.sub.4 = H) formed with inorganic or organic bases; the compounds as well as their salts are useful as antiphlogistics and antiproliferatives.
    Type: Grant
    Filed: October 15, 1973
    Date of Patent: May 3, 1977
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Ernst Seeger, Wolfhard Engel, Josef Nickl, Helmut Teufel
  • Patent number: 3997589
    Abstract: Compounds of the formula ##STR1## wherein R is hydrogen or alkyl of 1 to 4 carbon atoms, and, when R is hydrogen, non-toxic salts thereof formed with an inorganic or organic base; the compounds as well as the salts are useful as antiphlogistics and antiproliferatives.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: December 14, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Ernst Seeger, Wolfhard Engel, Josef Nickl, Helmut Teufel
  • Patent number: 3992535
    Abstract: Compounds of the formula ##SPC1##WhereinR.sub.1 is hydrogen, methyl or ethyl, andAr is phenyl, 3-chlorophenyl, 3-bromophenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 3-tolyl, 2-methoxyphenyl, 3-methoxyphenyl, 2-pyridyl, 4-methyl-2-pyridyl, 6-methyl-2-pyridyl, 3-hydroxy-2-pyridyl, 3-pyridyl, 4-pyridyl, 6-chloro-3-pyridazinyl, 2-pyrazinyl, 6-chloro-2-pyrazinyl, 6-chloro-4-pyrimidinyl, 2-thiazolyl, 4-methyl-2-thiazolyl, 4-ethyl-2-thiazolyl, 5-methyl-2-thiazolyl, 5-ethyl-2-thiazolyl, 4,5-dimethyl-2-thiazolyl, 4-ethyl-5-methyl-2-thiazolyl, 5-ethyl-4-methyl-2-thiazolyl, 2-benzothiazolyl, 4,5,6,7-tetrahydro-2-benzothiazolyl, 5,6-dihydro-7H-thiopyrano[4,3-d]thiazol-2-yl, 3-methyl-5-isothiazolyl, 1,3,4-thiadiazolyl, 5-methyl-1,3,4-thiadiazol-2-yl or 5-methyl-3-isoxazolyl,And non-toxic, pharmacologically acceptable salts thereof formed with an inorganic or organic base; the compounds as well as their salts are useful as inhibitors of platelet adhesion and aggregation.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: November 16, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Gunter Trummlitz, Helmut Teufel, Wolfhard Engel, Ernst Seeger, Walter Haarmann, Gunther Engelhardt
  • Patent number: 3987197
    Abstract: 3-(2'-Fluoro-4-biphenylyl)-butyric acid and salts thereof formed with inorganic or organic bases; the compound as well as its salts are useful as antiphlogistics and antirheumatics.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: October 19, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Wolfhard Engel, Helmut Teufel, Ernst Seeger, Josef Nickl, Gunther Engelhardt
  • Patent number: 3969523
    Abstract: Pharmaceutical compositions containing a compound of the formula ##SPC1##WhereinR.sub.1 is hydrogen, fluoro or chloro,R.sub.2 is hydrogen or alkyl of 1 to 3 carbon atoms, andR.sub.3 is nicotinoyl or isonicotinoyl, or an optically active antipode thereof; and a method of using the same as antiphlogistics.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: July 13, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Josef Nickl, Helmut Teufel, Wolfhard Engel, Ernst Seeger, Gunther Engelhardt
  • Patent number: 3969419
    Abstract: Compounds of the formula formula ##EQU1## wherein R.sub.1 is chlorine or fluorine, and R.sub.2 is hydrogen, alkanoyl of 1 to 10 carbon atoms, benzoyl, nicotinoyl or isonicotinoyl,Or, when R.sub.2 contains a basic nitrogen atom, a non-toxic, pharmacologically acceptable salt thereof formed with an inorganic or organic acid; the compounds as well as the salts are useful as antiphlogistics.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: July 13, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Wolfhard Engel, Helmut Teufel, Ernst Seeger, Gunther Engelhardt
  • Patent number: 3969418
    Abstract: Compounds of the formula ##SPC1##Wherein A is ##EQU1## or WHERE Z is hydrogen or methyl, andR.sub.1 is halogen or, when A is ##EQU2## also hydrogen, THE COMPOUNDS ARE USEFUL AS ANTIPHLOGISTICS.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: July 13, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Helmut Teufel, Wolfhard Engel, Ernst Seeger
  • Patent number: 3950427
    Abstract: Compounds of the formula ##SPC1##WhereinR.sub.1 is isobutyl, phenyl, o-fluoro-phenyl, o-chloro-phenyl, cyclopentyl, cyclohexyl, methyl-cyclo-hexyl or cycloheptyl,R.sub.2 is hydrogen, fluorine, chlorine or bromine,R.sub.3 is methyl, ethyl or, when R.sub.1 is phenyl, fluoro-phenyl or chloro-phenyl, or R.sub.1 is cyclohexyl and R.sub.2 is halogen, also hydrogen,Z.sub.1 and Z.sub.2 are hydrogen or together form an additional carbon-to-carbon bond,A is ##EQU1## or ##EQU2## and M IS 2, 4, 6, 8 OR WHEN R.sub.1 is halo-phenyl, isobutyl, cyclohexyl, methyl-cyclohexyl, cyclopentyl or cycloheptyl and/or R.sub.2 is halogen and/or R.sub.3 is methyl or ethyl and/or A is --CH(OH)--, also O; the compounds are useful as antiphlogistics.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: April 13, 1976
    Assignee: Boehringer Ingelheim GmbH
    Inventors: Wolfhard Engel, Josef Nickl, Helmut Teufel, Gunther Engelhardt, Ernst Seeger, Gunter Trummlitz