Photoimageable compositions containing photopolymerizable urethane oligomers and dibenzoate plasticizers
CA 2254797 C · Owner: Nichigo Morton Co. Ltd. · Inventors: Barr, Robert; Lundy, Daniel E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a negative acting photoimageable composition comprising an acid functional binder polymer, photopolymerizable .alpha..beta.-ethylenically unsaturated compounds and, photoinitiator, at least a portion of the photopolymerizable compounds are isocyanate trimers having tri-acrylate functionality. Further the composition contains a dibenzoate, plasticizer.
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 November 30, 1998 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2020.
- 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.