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:
Feb. 09, 1988
Filed:
Nov. 20, 1986
John A Duffy, West Milford, NJ (US);
Richard D Katstra, Warwick, NY (US);
Avon Products, Inc., New York, NY (US);
Abstract
Coherent powder compositions are formed by blending a powder phase containing at least 5 weight percent calcium sulfate hemihydrate with a liquid phase containing sufficient water to fully convert the hemihydrate to calcium sulfate dihydrate and drying the resultant blend. Uniformly pigmented products are formed by including a powdered pigment in the powder phase and 0.1 to 4.0 weight percent surfactant in the aqueous phase. Compositions suitable for use as cosmetic sticks are formed by employing at least 40 weight percent calcium sulfate hemihydrate. Preferably the products are formed by combining 40 to 60 parts by weight of aqueous phase with 50 parts by weight of powder phase. To improve pay-off characteristics the products are subjected to a temperature above 128.degree. C., the outer surface is abraded or up to 20 weight percent of the aqueous phase is glycerin or propylene glycol.