Synergistic initiator compositions for the visible light fabrication and postcure of stereolithographic objects
CA 2000331 A1 · Owner: Ansel, Robert E. · Inventors: Murphy, Edward J.; Krajewski, John J.; Ansel, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid composition which is photopolymerizable with visible light comprises a photopolymerizable ethylenically unsaturated liquid which is polymerizable by free-radical polymerization containing, based on the weight of the photopolymerizable ethylenically unsaturated material contained therein:, (1) from about 0.1% to about 5% of a photoreducible phthalein dye;, (2) from about 0.5% to about 10% of an aliphatic tertiary amine; and, (3) from about 1% to about 8% of a ketonic photoinitiator.
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 10, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2011.
- 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.