Anti-graffiti cement paste
CA 2240666 C · Owner: Martin, Louis-Marie Joseph · Inventors: Martin, Louis-Marie Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anti-graffiti cement paste includes from about 1 to about 41% by volume of a silicone caulking from about 1 to about 41% by volume of mineral spirits and from about 18 to about 98% by volume of a liquid cement. The cement paste provides good repellency against graffiti and is not sacrificial in nature.
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 October 30, 1997 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2019.
- 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.