INVENTORS’ CIRCLE
Newest Patent Approvals
Sunscreen compositions with natural waxes for improved water resistance
U.S. Patent No. 10,517,814
Edgewell Personal Care Brands, LLC
Edgewell Personal Care Brands, LLC, Chesterfield, MO, patented a sunscreen composition having improved water resistance
comprising (i) a sunscreen active agent; (ii) a water-resistant agent comprising a natural wax having a Damping Factor of less than
1.0 in a linear viscoelastic range at body temperature; and (iii) an emulsifier or a surfactant capable of stabilizing an emulsion of
components (i) to (iii), wherein said sunscreen composition maintains at least 75%, preferably at least 85%, and most preferably
at least 99%, of its static SPF after water immersion for four hours. These sunscreen compositions may also be formulated as a
concentrate with a propellant to provide a continuous spray commercial product. Examples of suitable propellants are isobutene,
butane, propane, dimethyl ether, methyl ether or a combination thereof. The aerosol propellant may comprise about 10% wt. to
60% wt., based on a total weight of the final composition. Alternatively, a bag-on-valve system may be used to deliver the sunscreen
composition using compressed gas such as air, nitrogen or carbon dioxide to deliver the composition onto the skin.
UV absorbing compounds
U.S. Patent No. 10,519,111
Coral Sunscreen Pty Ltd.
Coral Sunscreen Pty Ltd., Queensland, Australia, patented a range of novel compounds that have been demonstrated to have
useful electromagnetic radiation-absorbing properties. These compounds are suitable in a range of applications such as active
components in sunscreen formulations, paints, plastics, fabrics, glass and UV-protective coatings. Compositions can be formulated
as an aerosol formulation, water-in-oil or oil-in-water emulsion, as an oil-in-alcohol lotion, as a vesicular dispersion of an ionic or
non-ionic amphiphilic lipid, as a gel and as a solid stick.
Topical sunscreen composition
Cyberderm Laboratories Inc.
U.S. Patent No. 10,434,048
Cyberderm Laboratories Inc., Ottawa, Canada, patented a topical sunscreen composition that includes metal oxide sunscreen particles,
polylactic acid and a cosmetic carrier in which the metal oxide sunscreen particles and polylactic acid are dispersed. A method
of protecting human skin from ultraviolet (UV) radiation includes applying to human skin a topical sunscreen composition
including metal oxide sunscreen particles and polylactic acid dispersed in a cosmetic carrier. The cosmetic carrier can be selected to
provide a topical sunscreen composition—for example, a spray, a lotion, a cream, a stick, a gel, a foam or combination thereof.
UV-A/UV-B sunscreen composition
U.S. Patent No. 10,485,745
L’Oréal Paris
L’Oréal Paris, Paris, France, patented a photostable UV-A/UV-B-sunscreen composition that includes an oil-in-water or water-in-oil
emulsion. The emulsion includes at least one photostabilizer having anti-oxidant properties, at least one SPF booster and at least
one UV-A filter and at least one UV-B filter. The UV-A/UV-B sunscreen composition is essentially free of oxybenzone.
Organic Materials in Sunscreen Applications
U.S. Patent No. 10,300,0012
International Business Machines Corp.
International Business Machines Corp., Armonk, NY, has patented a method that entails selecting a combination of multiple
organic materials to incorporate into a sunscreen composition, wherein selection is based, at least in part, on a desired absorption
spectrum of the sunscreen composition; the absorption spectrum of each of the multiple organic materials and; a particle
size limitation for each of the multiple organic materials. The multiple organic materials comprise N,N'-Bis(naphthalen-1-yl)-N,N'-
bis(phenyl)-2,2'-dimethylbenzidine. The combination of organic materials is incorporated into the sunscreen composition to generate
the desired absorption spectrum.
28 Spray May 2020