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. 15, 1994
Filed:
Nov. 09, 1992
Rodney D Bush, Fairfield, OH (US);
Donald L Bissett, Hamilton, OH (US);
Ranjit Chatterjee, Cincinnati, OH (US);
The Procter & Gamble Company, Cincinnati, OH (US);
Abstract
The present invention involves photoprotective compositions which are useful for topical application to prevent damage to skin caused by acute or chronic exposure to ultraviolet light comprising chelating agents having the formula ##STR1## wherein --R.sup.1 and --R.sup.2 are independently selected from the group consisting of alkyl, aryl, and heteroaryl, or R.sup.1 and R.sup.2 may be covalently bonded together to form a cyclic alkyl; --M is selected from the group consisting of =0, =S, --SR.sup.4 and --OR.sup.4 (when --M is --OR.sup.4 or --SR.sup.4, there is a hydrogen bonded to the carbon to which --M is bonded); --R.sup.4 is selected from the group consisting of hydrogen, alkyl, aryl and heteroaryl; --R.sup.3 is selected from the group consisting of hydrogen, alkyl, aryl and heteroaryl; --R.sup.6 is selected from the group consisting of hydrogen alkyl, aryl and heteroaryl; and i is selected from the group consisting of one and zero. Methods for using such compositions to prevent damage to skin caused by acute or chronic exposure to ultraviolet light are al so involved.