Urethane modified epoxy resin compositions
CA 2115527 C · Owner: Ciba-Geigy Ag · Inventors: Uchida, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An epoxy resin composition characterized by comprising (A) an epoxy resin containing an oxazolidone ring (B) a halogen-containing epoxy resin and (C) a curing agent as its ingredients wherein the ratio by weight of ingredients (A) to (B) is 5 - 100:95-0 the hydrolizable chlorine content of ingredients (A) and (B) is no more than 500 ppm and the amount of .alpha.-glycol is no more than 100 m eq/kg has excellent properties and can be employed as the materials for electronic applications and as paints adhesives, molding materials, composite materials laminates and sealing materials.
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 February 11, 1994 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 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.