Method for pacifying stickies in paper
CA 1316300 C · Owner: Alchem Inc. · Inventors: Shawki, Shamel M.; Van Oss, Richard N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for pacifying stickies in the papermaking process. Accordingly the present, invention provides a paper making process in which paper furnish including recycled fibre is passed over drying rolls wherein for, the purpose of pacifying stickies in the paper product an aqueous, solution of urea is applied to the paper between the drying rolls and the finished produce reel. The amount of urea applied is such that the paper product bears a coating surface of urea in an amount between 0.1 g/m2 and 2.0 g/m2 of paper surface.
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
- Granted April 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 20, 2010.
- 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.