Film-forming substance for temporarily opacifying transparent or translucent surfaces
CA 2329611 A1 · Owner: Rsb Laboratorium B.V. · Inventors: Douarre, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a film-forming substance for temporarily opacifying transparent or translucent surfaces made of glass or rigid or flexible plastic such as, for instance, agricultural or horticultural greenhouse covering characterised in that it contains, in slightly alkaline water: at least one binding agent consisting of a resin based on acrylic derivatives having an acid index higher than 60; and at least a filler or pigment selected for example, among the following: calcium carbonate; silica or silicate; barium sulphate; titanium oxide; zinc oxide; mineral or organic coloured pigment.
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 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 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.