KAO Corporation Dual Hydrogel Patent, Apr 21
Summary
KAO Corporation has been granted US Patent 12605311B2 for a dual hydrogel structure comprising a continuous phase of a first hydrogel and a dispersed second hydrogel phase. The patent specifies a ratio of local minimum load after break to breaking load of 0.1 or more, covering 23 claims with inventors Saki Hamada and Shohei Toyota. The application was filed on February 5, 2021, under application number 18275832.
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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
KAO Corporation has obtained US Patent 12605311B2 for a dual hydrogel structure. The invention comprises a continuous phase of a first hydrogel and a dispersed second hydrogel phase, with a specified mechanical property ratio of at least 0.1. The patent covers 23 claims and lists Saki Hamada and Shohei Toyota as inventors.
Pharmaceutical, cosmetic, and chemical companies developing hydrogel-based products should review this patent to assess potential freedom-to-operate concerns. Competitors in personal care, drug delivery, or biomedical applications using dual-phase hydrogel technology may need to evaluate licensing options or design-around strategies.
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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.
Hydrogel structure
Grant US12605311B2 Kind: B2 Apr 21, 2026
Assignee
KAO CORPORATION
Inventors
Saki Hamada, Shohei Toyota
Abstract
A hydrogel structure (10) includes: a continuous phase (11) of a first hydrogel; and a dispersion phase (12) of a second hydrogel, the dispersion phase being dispersed in the continuous phase (11). A ratio of a local minimum value of a load after break to a breaking load (a local minimum value of a load after break/a breaking load) of the hydrogel structure (10) is 0.1 or more.
CPC Classifications
A61K 8/042 A61K 8/73 C08J 3/075 C08J 2305/12
Filing Date
2021-02-05
Application No.
18275832
Claims
23
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