Patents by Inventor Carl G. A. Persson

Carl G. A. Persson 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).

  • Method and pharmaceutical preparation for treating chronic obstructive airway disease and cardiac disease, and intermediates for the preparation of therapeutically active xanthine derivatives
    Patent number: 4804664
    Abstract: A method for the treatment of chronic obstructive airway disease or cardiac disease, characterized by the administration of a compound of the formula ##STR1## wherein R is n-propyl, n-butyl or isobutyl or a therapeutically acceptable salt thereof.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: February 14, 1989
    Assignee: Aktiebolaget Draco
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • 3-Alkylxanthines, composition and methods for the treatment of chronic obstructive-airway disease and cardiac disease
    Patent number: 4644001
    Abstract: Compounds having activity against chronic obstructive airway disease or cardiac disease, characterized by the formula ##STR1## wherein R.sup.1 is n-propyl, n-butyl, isobutyl, n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexylmethyl, and R.sup.2 is hydrogen or methyl, provided that R.sup.2 is methyl when R.sup.1 is n-propyl, n-butyl or isobutyl, or a physiologically acceptable salt thereof.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: February 17, 1987
    Assignee: Aktiebolaget Draco
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • Composition and methods for the treatment of chronic obstructive airway disease and cardiac disease using 3-alkylxanthines
    Patent number: 4548818
    Abstract: Compounds having activity against chronic obstructive airway disease or cardiac disease, characterized by the formula ##STR1## wherein R.sup.1 is n-propyl, n-butyl, isobutyl, n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexylmethyl, and R.sup.2 is hydrogen or methyl, provided that R.sup.2 is methyl when R.sup.1 is n-propyl, n-butyl or isobutyl, or a physiologically acceptable salt thereof.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: October 22, 1985
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • 3,8-Dialkylxanthines
    Patent number: 4546182
    Abstract: The invention refers to compounds having activity against chronic obstructive airway disease or cardiovascular disease, characterized by the formula ##STR1## wherein R.sup.1 is ethyl, n-propyl, n-butyl, isobutyl, n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, cyclopropyl, cyclobutyl, cyclopentyl or cyclohexylmethyl, and R.sup.2 is methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, tert. butyl, or cyclobutyl provided that R.sup.1 is ethyl when R.sup.2 is methyl, or a physiologically acceptable salt thereof. The invention also refers to processes for the preparation of these compounds, a pharmaceutical preparation containing one of the compounds and a method for the treatment of chronic obstructive airway disease and cardiovascular disease.
    Type: Grant
    Filed: August 16, 1983
    Date of Patent: October 8, 1985
    Assignee: Aktiebolaget Draco
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • Method for the treatment of chronic obstructive airway or cardiac diseases
    Patent number: 4338319
    Abstract: A method for the treatment of chronic obstructive airway disease or cardiac disease by administration 3-ethylxantine or a pharmaceutically acceptable salt thereof; a pharmaceutical preparation containing 3-ethylxanthine.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: July 6, 1982
    Assignee: Aktiebolaget Draco
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • Method and pharmaceutical preparation for treating chronic obstructive airway disease and cardiac disease, and intermediates for the preparation of therapeutically active xanthine derivatives
    Patent number: 4325956
    Abstract: A method for the treatment of chronic obstructive airway disease or cardiac disease, characterized by the administration of a compound of the formula ##STR1## wherein R is n-propyl, n-butyl or isobutyl or a therapeutically acceptable salt thereof.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: April 20, 1982
    Assignee: Aktiebolaget Draco
    Inventors: Per G. Kjellin, Carl G. A. Persson
  • Xanthine derivatives
    Patent number: 4233303
    Abstract: Compounds of the formula ##STR1## or physiologically acceptable salts thereof in which formula R.sup.1 is methyl, ethyl or n-propyl, R.sup.2 is methyl or n-propyl and R.sup.3 is ##STR2## methods for the preparation thereof; intermediates useful for their preparation; pharmaceutical preparations containing at least one of these compounds; and the use thereof in the treatment of allergy and bronchial asthma.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: November 11, 1980
    Assignee: Aktiebolaget Draco
    Inventors: Sten H. A. M. Bergstrand, Per G. Kjellin, Carl G. A. Persson, Lars M. Sorenby