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Details for Patent: 5,441,958

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Summary for Patent: 5,441,958

Title: Ophthalmic compositions comprising emedastine and methods for their use
Abstract:Topical ophthalmic compositions comprising 1-(2-ethoxyethyl)-2-(4-methyl-1-homopiperazinyl)-benzimidazole and its ophthalmically acceptable acid addition salts have been found to be useful in treating allergic conjunctivitis and related ailments.
Inventor(s): Yanni; John M. (Burleson, TX), Robertson; Stella M. (Arlington, TX), Okumura; Shigetoshi (Nara, JP), Tanaka; Hitoshi (Nara, JP), Saito; Tadayuki (Osaka, JP)
Assignee: Alcon Laboratories, Inc. (Fort Worth, TX)
Application Number:08/163,973
Patent Claim Types:
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Patent PDF download available with subscription

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Foreign Priority and PCT Information for Patent: 5,441,958

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan4-329216Dec 09, 1992

International Patent Family for Patent: 5,441,958

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria185696<disabled in preview>
Australia5744294<disabled in preview>
Australia667613<disabled in preview>
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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