USPTO Patent Granted for Keratin Fiber Composition

ChangeBridge: Patent Grants - Pharma (A61K)

Published March 24th, 2026

Detected March 25th, 2026

Summary

The USPTO has granted a patent (US12582596B2) to KAO CORPORATION for a solid cosmetic composition for keratin fibers. The patent details specific formulations involving non-silicone lipophilic compounds, pulverulent excipients, and cationic compounds, with defined concentration limits for excipients and water content.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12582596B2 to KAO CORPORATION for a solid cosmetic composition intended for keratin fibers, specifically human hair. The patent outlines a formulation comprising non-silicone lipophilic compounds with a melting point above 25° C, pulverulent excipients (at 1% by weight or more), and cationic/cationizable compounds. Key restrictions include a total water content of less than 10% by weight.

This patent grant is primarily an intellectual property matter and does not impose new regulatory obligations on companies. However, it signifies a specific innovation in cosmetic formulations that may impact market competition and product development within the cosmetics and personal care sector. Companies operating in this space should be aware of this granted patent as it pertains to their product development and intellectual property strategies.

Source document (simplified)

← USPTO Patent Grants

Solid composition for keratin fibers

Grant US12582596B2 Kind: B2 Mar 24, 2026

Assignee

KAO CORPORATION

Inventors

Petra Lobmueller, Andreas Picker, Anja Aechtner

Abstract

The present invention is directed to a solid cosmetic composition for keratin fibers, preferably human keratin fibers, more preferably human hair, comprising: one or more non-silicone lipophilic compound(s) having a melting point above 25° C. under atmospheric pressure, one or more pulverulent excipient(s), one or more cationic and/or cationizable compound(s), wherein the concentration of pulverulent excipients is 1% by weight or more, calculated to the total weight of the composition, and wherein the total concentration of water is less than 10% by weight, preferably less than 5% by weight, more preferably less than 1% by weight, still more preferably less than 0.5% by weight, calculated to the total weight of the composition.