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Serving leading biopharmaceutical companies globally:

Harvard Business School
Boehringer Ingelheim
Federal Trade Commission
Argus Health

Generated: December 18, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,540,918

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Summary for Patent: 5,540,918

Title: Use of certain anionic surfactants to enhance antimicrobial effectiveness of ophthalmic compositions
Abstract:Certain anionic surfactants are used to enhance antimicrobial effectiveness in comfortable, sustained release ophthalmic compositions containing polyelectrolytes, such as carboxyvinyl polymers, polystyrene sulfonic acid polymers and cationic exchange resins, as well as at least one active ingredient.
Inventor(s): Castillo; Ernesto J. (Arlington, TX), Ali; Yusuf (Fort Worth, TX)
Assignee: Alcon Laboratories, Inc. (Ft. Worth, TX)
Application Number:08/472,446
Patent Claim Types:
see list of patent claims
Composition; Compound;

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International Patent Family for Patent: 5,540,918

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia666957► Subscribe
Australia671374► Subscribe
Australia6750994► Subscribe
Canada2104917► Subscribe
Germany69315406► Subscribe
Australia4440193► Subscribe
Denmark0590786► Subscribe
European Patent Office0590786► Subscribe
Austria160503► Subscribe
Spain2111717► Subscribe
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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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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Harvard Business School
Cantor Fitzgerald
Farmers Insurance
US Department of Justice

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