Two-layer coating and process for its production
CA 2040622 A1 · Owner: Kosters, Bernhard · Inventors: Butschbacher, Gunther; Kosters, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two-layer, vibration-absorbing and anti- corrosive abrasion-resistant coating for rigid substrates in, particular for sheet metals in the underbody region of motor vehicles, for reducing the noise caused by impacting particles, comprises an inner layer, facing the substrate, of a polymer A and a plasticizer P1 and a covering, layer of a polymer B and a plasticizer P2 such that either, the polymers A and B have a different chemical composition and the polymer A is essentially incompatible with the plasticizer P2 and the polymer B is essentially incompatible with the plasticizer P1, or both layers contain essentially the same concentration of one plasticizer (P1 = P2) so that, there is no …
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 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.