Pigmented mirror resin backings and mirrors
CA 2191127 C · Owner: Ppg Industries Ohio, Inc. · Inventors: Stephen, Mathew; Torgussen, Ole Gerhard; Hughes, Zephuren James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mirror resin backings containing antioxidant pigments which are cyanamide derivatives of metals are protective backing coatings for glass substrates and mirrors, the resin backings including melamine based resin coatings which provide anti-corrosion protection for the metal layers with metal cyanamide antioxidant pigments.
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 May 24, 1994 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2016.
- 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.