Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Reexamination Certificate
2006-06-29
2010-10-19
Gupta, Yogendra N (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
C264S227000, C264S401000, C264S425000
Reexamination Certificate
active
07815835
ABSTRACT:
The invention relates to a method for producing three-dimensional objects, comprising producing a three-dimensional structure by sequential selective curing of layers of a composition curable with visible and/or ultraviolet light into a solid polymeric material by sequential exposure of the individual layers to UV and/or visible light, whereafter a three-dimensional object is produced by use of the three-dimensional structure thus formed, followed by removing the three-dimensional structure from or of the three-dimensional object, characterized in that removing the three-dimensional structure is accomplished by chemically cleaving the polymeric material as well as simultaneously or subsequently dissolving the material in a solvent or mixed solvent and/or melting the material.
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Gruber Heinrich
Inführ Robert
Lichtenegger Helga
Liska Robert
Stampfl Jürgen
Brown, II David N
Drinker Biddle & Reath LLP
Gupta Yogendra N
Technische Universitat Wien
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