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:
Jul. 05, 1977
Filed:
Jul. 15, 1976
Applicant:
Inventors:
Henri Pourrat, Clermont Ferrand Cedex, FR;
Aimee Pourat nee Gaillard, Clermont Ferrand Cedex, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12D / ;
U.S. Cl.
CPC ...
195-7 ; 195 32 ; 424195 ; 2602365 ;
Abstract
The invention provides a process for the preparation of a complete extract of pilewort roots, used in cosmetological compositions, which consists of first subjecting the dried and ground roots to an extraction with 35.degree.-45.degree. C petroleum ether and then treating the insoluble powder by extraction with an aqueous lower alcohol. After having removed the insoluble impurities by filtration, the filtrate is treated with papaine and is concentrated to a solids content of 40 to 50%. Aqueous alcohol is then added to the concentrated extract and the deposit thus formed is removed by decantation when cold, leaving the desired extract.