Process for the preparation of uv protective coatings by plasma-enhanced deposition
CA 2328975 A1 · Owner: Kaufmann, Werner · Inventors: Kaufmann, Werner; Bauer, Michael; Rytz, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process for the preparation of UV protective coatings by plasma-enhanced vacuum deposition using hydroxyphenyl-s-triazines , as UV absorbers. This invention also relates to the use of hydroxyphenyl-striazines in plasma-enhanced vacuum depositions and to the substrates coated by this process.
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 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2021.
- 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.