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. 21, 1999
Filed:
Oct. 06, 1997
Dharam Chand Jain, , US;
Sudeep Tandon, , US;
Rajendra Singh Bhakuni, , US;
Mohammed Shafique Siddique, , US;
Atul Prakash Kahol, , US;
Ram Prakash Sharma, , US;
Sushil Kumar, Lucknow-226015, IN;
Asish Kumar Bhattacharya, , US;
Other;
Abstract
This invention relates to a novel process for the dual production of essential oil and artemisinin from the plant Artemisia annua, said process comprising extracting the plant with hexane, partitioning the hexane extract between hexane and acetonitrile, hydrodistillation of hexane residue and Marc to yield essential oil, further fractionation of acetonitrile solvent between hexane-benzene mixture to remove artemisinic acid, chromatographing of the acetonitrile phase to produce substantially pure artemisinin, the artemisinic acid is reduced to obtain dihydro artemisinic acid which is then oxidised in a single step to form artemisinin.