Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2011-03-08
2011-03-08
Johnson, Christina (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C264S211190, C264S343000, C264S177200, C264S328180, C264S232000, C264S049000, C264S344000, C264S005000, C264S006000, C264S007000, C264S008000, C264S009000, C264S010000, C264S011000, C264S012000, C210S634000, C210S639000, C424S450000, C424S484000, C424S489000
Reexamination Certificate
active
07901606
ABSTRACT:
The present invention provides a method of producing porous structures, particles or matrixes, which may be comprised of one or a plurality of components, an apparatus for carrying out the method and particles formed in accordance with the method. The method is particularly suitable for producing porous composite or pure particles for pharmaceutical applications. In accordance with the method, a composite comprising a material such as a pharmaceutical, a biodegradable polymers and/or a biological agent is formed. The composite must further comprise a material that is soluble in supercritical fluid. Extraction of the supercritical fluid soluble material produces porous structures, which may be in the form of particles or matrixes.
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Chattopadhyay Pratibhash
Seitzinger Jeffrey S.
Shekunov Boris Y.
Ferro Corporation
Huda Saeed M
Johnson Christina
Rankin , Hill & Clark LLP
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