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Details for Patent: 6,352,684

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Summary for Patent: 6,352,684

Title: CRC-free medicinal aerosol formulations of 1,1,1,2-tetrafluoroethane (134A) with polar adjuvant
Abstract:A medicinal aerosol formulation including 0.01-5% medicament, at least 50% by weight 1,1,1,2-tetrafluoroethane (134a), less than 5% surface active agent, and at least one compound having higher polarity than 1,1,1,2-tetrafluoroethane, and which is free of chlorofluorocarbons and propellants CHClF.sub.2, CH.sub.2 F.sub.2 and CF.sub.3 CH.sub.3.
Inventor(s): Purewal; Tarlochan S. (Leamington Spa, GB), Greenleaf; David J. (Loughborough, GB)
Assignee: Riker Laboratories Inc. (St. Paul, MN)
Application Number:09/067,346
Patent Claim Types:
see list of patent claims
Formulation; Compound;
Patent Metrics:
Source: PatentQuant.com
Field: Pharmaceuticals
Back Citations: 64th percentile
Forward Citations: 1st percentile

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Premature patent expiration for: 6,352,684

Expiration due to failure to pay maintenance fee

Patent Number Expiration Date
6,352,684 March 05, 2014

Foreign Priority and PCT Information for Patent: 6,352,684

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom88284773Dec 06, 1988

International Patent Family for Patent: 6,352,684

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia4595689► subscribe
Australia631155► subscribe
Canada2004598► 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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