KAO Corporation External Skin Preparation Patent US12605315B2
Summary
USPTO granted Patent US12605315B2 to KAO Corporation on April 21, 2026, for an external skin preparation containing tabular metal oxide (A) with thickness 30-360 nm and aspect ratio 50-300, combined with UV absorbent (B) in a mass ratio of 0.1 to 5. The patent also covers formulations combining metal oxide (A), UV scattering agent (C), and nonvolatile oil (D), plus a method for protecting skin from IR and UV rays. Inventors are Takashi Fukui and Noriko Tejima, with 11 claims allowed under CPC classifications A61K 8/29, A61K 8/27, A61K 8/92, and related categories.
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GovPing monitors USPTO Patent Grants - Pharma (A61K) for new healthcare & life sciences regulatory changes. Every update since tracking began is archived, classified, and available as free RSS or email alerts — 22 changes logged to date.
What changed
USPTO issued Patent US12605315B2 to KAO Corporation on April 21, 2026, covering external skin preparations that combine tabular metal oxide (A) with UV-absorbing and scattering agents. The primary embodiment claims a ratio of metal oxide to UV absorbent (A/B) by mass of 0.1 to 5; secondary claims cover formulations with UV scattering agent and nonvolatile oil at (A/C) ratios of 0.1 to 18. The patent also protects a method for protecting skin from IR and UV rays.
Pharmaceutical and cosmetics manufacturers developing UV-protective topical formulations should review this patent for freedom-to-operate considerations. The specific combination of tabular metal oxide with defined thickness (30-360 nm) and aspect ratio (50-300) with UV actives represents potentially protected subject matter. Competitors in the sunscreen and dermatological skincare space should evaluate their formulations against these claims.
Archived snapshot
Apr 22, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
External skin preparation
Grant US12605315B2 Kind: B2 Apr 21, 2026
Assignee
KAO CORPORATION
Inventors
Takashi Fukui, Noriko Tejima
Abstract
The present invention relates to [1] an external skin preparation containing a tabular metal oxide (A) having a thickness of 30 to 360 nm and an aspect ratio of 50 to 300, and a UV absorbent (B) in a ratio [(A)/(B)] by mass of 0.1 to 5; [2] an external skin reparation containing the tabular metal oxide (A), a UV scattering agent (C) and a nonvolatile oil (D) in a ratio [(A)/(C)] by mass of 0.1 to 18; and [3] a method for protecting skin from IR rays and UV rays by applying the external skin preparation to skin.
CPC Classifications
A61K 8/29 A61K 8/27 A61K 8/92 A61K 2800/413 A61K 2800/522 A61Q 17/04
Filing Date
2019-12-27
Application No.
17417573
Claims
11
Mentioned entities
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