Acylphosphine oxide photoinitiators in methacrylate casting resins
CA 2422156 A1 · Owner: Auschra, Clemens · Inventors: Litzler, Andre; Auschra, Clemens; Jahn, Reiner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A photopolymerisation process for the production of mouldings from methacrylate casting resins wherein 1) a methacrylate casting resin formulation containing (A1) > 50 % methyl methacrylate and/or a prepolymerisate containing a high proportion of methyl methacrylate (A2) 0 to , 40 % other monomers than can be copolymerised with methyl methacrylate (B) , 0.1 to 10 % at least one mono- or bis-acylphosphine oxide photoinitiator C) 0 , to 10 % other photoinitiators, D) 0 to 5 % thermal initiators and E) optionally further customary additives is cast in a mould and 2) is fully cured by irradiation with a light source in the range of from 200 to 800 nm to form a mechanically stable moulding.
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 September 6, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2023.
- 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.