Paint containing high levels of a pyrithione salt plus a copper salt
CA 2079465 C · Owner: Ruggiero, Murray A. · Inventors: Ruggiero, Murray A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an improved paint or paint base composition characterized by enhanced biocidal efficacy. The paint or paint base composition is essentially free of tin lead, and vanadium , and contains a biocide comprising pyrithione salt and a copper salt. The pyrithione salt is present in the paint in an amount of between about 5 % and about 50 %, and the copper salt is present in an amount of between about 5 % and about 50 % the total , amount of biocide being between about 10 % and about 75 %, based upon the total weight of the paint composition.
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 March 28, 1991 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 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.