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:
May. 01, 2001
Filed:
Jun. 29, 1999
Applicant:
Inventors:
Steven H. Bertz, Mendham, NJ (US);
Frank M. Miksza, Colonia, NJ (US);
Elliott Zucker, Shohola, PA (US);
Assignee:
ISP Investments Inc., Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 6/708 ; C07C 6/960 ; A61K 7/48 ; A61K 7/075 ;
U.S. Cl.
CPC ...
C07C 6/708 ; C07C 6/960 ; A61K 7/48 ; A61K 7/075 ;
Abstract
What is shown is a high purity adduct of castor oil and a cyclic carboxylic acid anhydride, charactered by the absence of free acid anhydride, which is used in personal care products. The adduct is made by a process, without side reactions, which includes (a) reacting castor oil and cyclic carboxylic acid anhydride at a temperature of 75-120° C. for 4 to 24 hours, and then (b) continuing the reaction at room temperature for at least 1 week to react any remaining maleic anhydride. Skin and hair care formulations of such adducts are also described.