Stereolithographic construction techniques
CA 2072136 C · Owner: Smalley, Dennis Rollette · Inventors: Smalley, Dennis Rollette; Hull, Charles William; Allison, Joseph Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved methods for building stereolithographically-formed parts include providing skinned layers in more than the upand down- facing features of the part, to methods for avoiding over-exposure of down-facing regions at points of intersection of exposing vectors, and to methods for determining skin thickness.
Read the whole patent
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, 1990 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2012.
- 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.