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Details for Patent: 5,292,515

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Summary for Patent: 5,292,515

Title: Manufacture of water-swellable hydrophilic articles and drug delivery devices
Abstract:A method of preparing a hydrophilic plastic cartridge by centrifugally cang polymerizable hydrophilic material in a rotating polymerization tube whose longitudinal axis is maintained parallel to the ground. The speed of rotation causes radial outward displacement of the polymerizable material which upon assuming a predetermined shape within the rotating tube is then polymerized to the predetermined solid configuration. The resulting plastic cartridge is characterized by smooth, unscored internal and external cylindrical surfaces. The cartridges are used as a rate-limiting membrane in drug delivery devices. Sterilized kits containing a disposable needle/syringe or trocar-like instrument and the drug delivery device are used for subcutaneous implantation of the device in an animal body.
Inventor(s): Moro; Daniel G. (Randolph, NJ), Kuzma; Petr (Monmouth Junction, NJ), Quandt; Harry (North Middletown, NJ)
Assignee: Hydro Med Sciences, a Division of National Patent Development Corporation (New York, NY)
Application Number:08/041,523
Patent Claim Types:
see list of patent claims
Use; Delivery; Device; Composition;

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Foreign Priority and PCT Information for Patent: 5,292,515

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
92 300394.1Oct 05, 1992

International Patent Family for Patent: 5,292,515

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia651654► subscribe
Canada2059377► subscribe
Australia1018392► 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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