Method of producing fluff pulp with improved defibration properties
CA 2013321 C · Owner: Cultor Ltd. · Inventors: Laine, Jaakko E.; Niemi, Tapio; Jokinen, Olli
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the production of fluff pulp with improved defibration properties by exposing the pulp to an enzyme treatment at any stage during the pulp production process. The enzyme treatment is preferably carried out by means of an enzyme preparation containing cellulolytic and/or hemicellulolytic activity. The enzyme treated fluff pulp is particularly useful in the manufacture of disposable hygiene products and air-laid products.
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, 1990 and granted November 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 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.