Method of and apparatus for forming a solid three-dimensional article from a liquid medium
CA 2075985 A1 · Owner: Quadrax Corporation · Inventors: Hill, Ray Mcgaffey; Saggal, Abdalla F.; Heller, Timmy Boyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus (20) for forming a solid three-dimensional article by exposure of successive layers of a liquid material to a vertically movable energy source (32). The apparatus includes a fixed support plate (28) disposed in a container (24) the, liquid being dispensed to successively higher levels in the container above the plate. In one embodiment, the liquid is fed from a reservoir (25) below the plate to an upper portion of the container above the plate by an expandable member (150) disposed in the reservoir. A vertically movable liquid dispenser (34) may be provided above the plate either alone or in combination with the expandable member. The energy source includes a laser …
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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 February 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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
Timeline From CIPO dates
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.