A yankee cylinder and a method for coating a yankee cylinder
CA 2009372 C · Owner: Majava, Jorma · Inventors: Majava, Jorma; Tenkula, Jaakko; Hellman, Bjarne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a Yankee cylinder for a paper-making machine, in which a coating which is a mixture of a metal powder and a carbide or nitride and withstands well the wearing effect of the doctor blade and other corrosive and thermal stresses produced in paper making is formed on top of the cylinder mantle. The invention also relates to methods for coating a Yankee cylinder with such a coating by using a detonation, plasma or supersonic method.
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 February 6, 1990 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2012.
- 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.