Liquid polymerizable composition for the production of high refractive index optical articles
CA 1331668 C · Owner: Renzi, Fiorenzo · Inventors: Renzi, Fiorenzo; Gagliardi, Claudio; Romano, Ugo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
LIQUID POLYMERIZABLE COMPOSITION FOR THE PRODUCTION OF HIGH REFRACTIVE INDEX OPTICAL ARTICLES" Abstract, A liquid composition comprising: (A) a monomeric, or essentially monomeric diallyl-, carbonate of a possibly halogenated diol containing aromatic groups; or a diallyl-ester of a halogenated aromatic bicarboxy acid;, (B) a reactive monomer selected from diallyl orthophthalate, diallyl isophthalate, diallyl terephthalate, triallyl cyanurate and triallyl isocyanurate;, (C) an oligomeric, or essentially oligomeric diallyl-, carbonate of diethylene glycol is polymerized under the action of a free-radical initiator, in order to yield optical articles having a high refractive index, low light …
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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
- Granted August 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 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.