Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – With reshaping or surface embossing of formed article
Reexamination Certificate
2005-08-02
2005-08-02
Lechert, Jr., Stephen J. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
With reshaping or surface embossing of formed article
C264S122000, C264S123000, C264S126000, C264S120000, C264S241000, C264S291000
Reexamination Certificate
active
06923927
ABSTRACT:
The invention is directed to methods involving rewetting of expandable polymers with a wettable liquid to allow for enhanced expansion at or below room temperature without breakage, and in some cases, allows one to achieve a greater expansion ratio than that allowed at elevated temperatures using known methods. The wettable liquid can be formed of a drug and/or an agent, such that the resulting polymer contains and emits the drug upon positioning at a target location of a patient body. The expandable polymer can also have the drug or agent added to its structure at a polymer resin preparation stage, through use of an aqueous solution mixed with one or more fluoropolymers, or in a mixing stage. The present invention also allows one to achieve material with unique properties and handling characteristics. These properties included decreased material thickness, increased density, an altered node/fibril morphology, and a more consistent web in the case of flat material. This method is not limited to room temperature conditions and can be applied whenever the expandable polymer material is wet with a wettable liquid, and the expansion is performed at a temperature preferably below the vaporization or boiling points of that liquid.
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Libby P. Atherosclerosis: the new view. Sci Am. May 2002;286(5):46-55.
Herweck Steve A.
Karwoski Theodore
Labrecque Roger
Martakos Paul
Moodie Geoffrey
Atrium Medical Corporation
Lechert Jr. Stephen J.
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