Primer
CA 2345479 A1 · Owner: Merz, Peter W. · Inventors: Tsuno, Shingo; Merz, Peter W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New primers for the improvement of the adhesion of cross-linking adhesive systems to polyolefinic thermoplastic materials such as e.g. polypropylene polyethylene or EPDM are disclosed. Said primers, on the one hand are characterized by a simple method of production and good storage stability on the, other hand by good wetting and good homogeneous film forming characteristics, said film forming characteristics enabling a uniform thickness of the layer, leading to good adhesion qualities. Essential constituent of such primers are prepolymers based on hydrated polyisoprene diol.
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 April 30, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2023.
- 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.