Adhesive or coating compositions and their uses
CA 2052298 A1 · Owner: Quinn, Neil C. · Inventors: Hope, Philip S.; Malley, Peter J.; Quinn, Neil C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyolefin containing compositions with increased adhesion suitable for bonding to metals, such as steel or polymers such as, polyamides or EVOH and to polyethylene eg to form layered structures or coated pipes, comprise A, a high density polyethylene grafted with an unsaturated carboxylic acid or derivative and B a very low density, polyethylene and preferably either consist essentially of A and B or also comprise C another polyolefin, eg HDPE or LDPE.
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 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2013.
- 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.