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US 7,029,663 B1Granted
Stable ointment containing acetylsalicylic acid
AssigneeTeikoku Seiyaku Co., Ltd.
InventorsNoriko Mizobuchi, Yuichi Hasegawa, Mitsuhiro Kawada, Shin-ichi Hisaichi
Life of this patent
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Abstract
A substantially anhydrous stable ointment containing Aspirin which is characterized in using gelation hydrocarbon and/or vaseline as a base. The ointment is superior in stability and can be stored for a long term.
Claims5
An ointment consisting of acetyl salicylic acid and a base selected from the group consisting of hydrocarbon gel, petrolatum and a mixture thereof without any other additive for said acetyl salicylic acid and wherein the ointment does not contain water for dissolving said acetyl salicylic acid,
- wherein when the base is hydrocarbon gel or a mixture of hydrocarbon gel and petrolatum, the acetyl salicylic acid is in a range of 20 to 30% by weight per total weight, and wherein when the base is petrolatum, the acetyl salicylic acid is in a range of 25 to 30% by weight per total weight.
Dependencies are inferred from the claim text.