The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1983
Filed:
Jun. 14, 1982
Applicant:
Inventors:
Assignees:
Degussa Aktiengesellschaft, Frankfurt, DE;
Degussa Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544267 ; 424253 ;
Abstract
Pure hydroxypropyltheophylline is produced by the catalytic reaction of theophylline with glycidol in the presence of a hydroxide of a short chain alcoholate of an alkali metal or an alkali metal salt of a pseudohydrohalic acid which has a readily polarizable anion. The catalyst is suitably employed in an amount between 0.01 and 0.2 moles per mole of theophylline. The dihydroxypropyltheophylline is obtained directly in the reaction in a high purity.
Binder, Volker. (1983). Process for the production of dihydroxypropyltheophylline (U.S. Patent No. 4405783). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4405783
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile