Method for avoiding pitch troubles by use of the thermostable lipase
CA 2099019 C · Owner: Fujita, Yuko · Inventors: Itami, Ryoko; Abo, Masanobu; Matsukura, Motoo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
More effective prevention of pitch troubles in a process for producing mechanical pulp or in a paper-making process using mechanical pulp. A paper-making process is conducted by addition of a fatty acid glyceride hydrolysing enzyme that is resistant to temperatures above 70 °C to paper-making raw material or white water that is exposed to temperatures above 70 °C.
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 January 24, 1992 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 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.