Patents by Inventor Leif Ake Svensson

Leif Ake Svensson 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).

  • Orally active bronchospasmolytic compounds
    Patent number: 4011258
    Abstract: Novel compounds are disclosed having useful activity as bronchodilators of improved longevity of action and reduced incidence of side effects. These compounds are described by the formula: ##STR1## wherein R.sub.1 is a member of the class consisting of tertiary butyl and cyclobutyl, and R.sub.2 is a hydrogen or 2 to 5 carbon atom acyl radical, and pharmaceutically acceptable salts thereof. The activity of these compounds is compared to previously known bronchodilators such as 1-(3', 5'-dihydroxyphenyl)-2-(isopropylamino)-ethanol, having the common name orciprenaline, and 1-(3', 4'-dihydroxyphenyl-2-isopropylamino-ethanol, having the common name isoprenaline.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: March 8, 1977
    Assignee: Aktiebolaget Draco
    Inventors: Kjell Ingvar Leopold Wetterlin, Leif Ake Svensson
  • Orally active bronchospasmolytic compounds and their preparation
    Patent number: 3937838
    Abstract: Novel compounds are disclosed having useful activity as bronchodilators of improved longevity of action and reduced incidence of side effects. These compounds are described by the formula: ##EQU1## wherein R.sub.1 is a member of the class consisting of tertiary butyl and cyclobutyl, and R.sub.2 is a hydrogen or 2 to 5 carbon atom acyl radical, and pharmaceutically acceptable salts thereof. The activity of these compounds is compared to previously known bronchodilators such as 1-(3', 5'-dihydroxyphenyl)-2-(isopropylamino)-ethanol, having the common name orciprenaline, and 1-(3', 4'-dihydroxyphenyl-2-isoproplyamino-ethanol, having the common name isoprenaline.
    Type: Grant
    Filed: June 21, 1973
    Date of Patent: February 10, 1976
    Assignee: Aktiebolaget Draco
    Inventors: Kjell Ingvar Leopold Wetterlin, Leif Ake Svensson