- Patent Title: Topical composition containing ascorbic acid and/or salt thereof
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Application No.: US17279296Application Date: 2019-09-25
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Publication No.: US12296038B2Publication Date: 2025-05-13
- Inventor: Yu Kitaoka , Mariko Iwai , Sho Yamashina
- Applicant: ROHTO PHARMACEUTICAL CO., LTD.
- Applicant Address: JP Osaka
- Assignee: ROHTO PHARMACEUTICAL CO., LTD.
- Current Assignee: ROHTO PHARMACEUTICAL CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Eventide Law LLC
- Priority: JP2018-179018 20180925
- International Application: PCT/JP2019/037537 WO 20190925
- International Announcement: WO2020/067132 WO 20200402
- Main IPC: A61K8/67
- IPC: A61K8/67 ; A61K8/34 ; A61Q19/00

Abstract:
Provided is a very stable topical composition. A topical composition is prepared that contains (A) from 1 to 40% by mass of at least one type selected from the group consisting of ascorbic acid and salts of ascorbic acid; (B) at least 20% by mass of a diol having three carbon atoms; (C) at least one type selected from the group consisting of tocopherol, salts of tocopherol, and derivatives of tocopherol; and (D) water, wherein the mass ratio of component (D) to component (A) is from 0.5 to 5.0 and the topical composition includes less than 20% by mass of glycol ether.
Public/Granted literature
- US20220031597A1 TOPICAL COMPOSITION CONTAINING ASCORBIC ACID AND/OR SALT THEREOF Public/Granted day:2022-02-03
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