Polyurethane block copolymer
CA 2126353 C · Owner: Adco Products, Inc. · Inventors: Van Valkenburg, Cheryl; Baghdachi, Jamil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silane-capped polyurethane block copolymer comprising at least one polyester block acid at least one polyacrylate block is disclosed. The copolymer can be used in coatings and is particularly , useful as a primer coating especially as a primer for , non-porous surfaces to which adhesives will be applied.
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 December 10, 1992 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2014.
- 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.