Simultaneous multiple layer curing in stereolithography
CA 2095225 A1 · Owner: 3D Systems, Inc. · Inventors: Evans, Herbert E. Jr.; Freed, Raymond S.; Jacobs, Paul F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and apparatus for slicing a three-dimensional object representation into a plurality of layer representations. The layer representations are subsequently used to form the object layer-by-layer from a solidifiable material by stereolithography (711). If not already provided in the object representation a, plurality of layer boundary representations are first formed and then, the boolean difference (17), of successive layer boundary representations are computed to derive boundaries of up and down-facing regions, enabling different cure parameters to be specified for these different regions. In another method the depth of the, curable material within the objet underlying a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 30, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.