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:
Aug. 16, 1988
Filed:
Dec. 10, 1986
Applicant:
Inventors:
Nagaraj R Ayyangar, Maharashtra, IN;
Anil R Choudhary, Maharashtra, IN;
Uttam R Kalkote, Maharashtra, IN;
Vasant K Sharma, Maharashtra, IN;
Assignee:
Council of Scientific & Industrial Research, New Delhi, IN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546 44 ;
Abstract
Codeine is prepared by reacting morphine with trimethyl phenyl ammonium chloride in the presence of an alkali metal carbonate and a hydrocarbon solvent at a temperature of from 40.degree. to 120.degree. C. Codeine is recovered from the reaction mixture. Codeine is useful as an analgesic and antitussive drug.