Composition for cleaning wood plastic and metal surfaces
CA 2068919 A1 · Owner: Les Produits Preservatifs Du Bois Saurwein Ltee./Saurwein'S Wood Preserv Ation Products Ltd. · Inventors: Saurwein, H. Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, There is disclosed a general purpose cleaning composition including potash, a soap, an aqueous solution of ammonia, washing soda, nitric acid and water. The cleaning composition may be used on wood surfaces, as well as on plastics and aluminum.
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 May 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2014.
- 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.