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:
Nov. 16, 2004
Filed:
Dec. 18, 2002
Applicant:
Inventors:
Assignee:
Coty B.V., , NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
Q01N 3/100 ;
U.S. Cl.
CPC ...
Q01N 3/100 ;
Abstract
The invention relates to a new method for determination of realistic UV protection factors or bread spectrum indices of a sunscreen preparation. Realistic UV protection factors are calculable by determination of the theoretical and the experimental UV absorbances of known UV filters in wavelength steps of about 5 nm in the range of 290-400 nm from a definite basic formulation (emulsion, gel etc.) and on a transparent substrate and introducing of the values in a mathematical model. These factors are in conformity with values measured in vivo. The number of the experiments for developing new formulations are significant reduced because only basic formulation, kind and concentration of the filters have to enter.