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US 5,441,726 AGranted
Topical ultra-violet radiation protectants
AssigneeSunSmart, Inc.
InventorsMark Mitchnick, Mamoun Muhammed
Life of this patent
Estimating the term…
Abstract
Disclosed are compositions for application to a surface to protect the surface from ultra-violet radiation, which include zinc oxide particles having a substantially rod shape.
Claims13
A sunscreen composition for application to human skin, said composition comprising
- a plurality of zinc oxide particles, each said particle having a substantially rod shape comprising a substantially spherical cross-section, smooth and rounded ends, and an aspect ratio of at least two, wherein said plurality of particles does not clump upon spreading on human skin;
- and
- an emollient for spreading on human skin,
- said plurality of particles being dispersed within said emollient in an amount effective to shield substantially all of said skin over which said composition is applied from hazardous effects of ultraviolet radiation.
1 more element
A method of protecting human skin from hazardous effects of ultra-violet radiation, the method comprising
- applying to human skin an amount of a spreadable sunscreen composition effective to shield said skin over which said composition is applied from the hazardous effects of UV radiation, said composition comprising a plurality of zinc oxide particles, each said particle having a substantially rod shape comprising a substantially spherical cross-section, smooth and rounded ends, and an aspect ratio of at least two, wherein said plurality of particles does not clump upon spreading on human skin;
- and an emollient for spreading on human skin, said plurality of particles being dispersed within said emollient in an amount effective to shield substantially all of said skin over which said composition is applied from hazardous effects of ultraviolet radiation.
Dependencies are inferred from the claim text.