Preparation of cellulosic materials
CA 2450709 A1 · Owner: Novozymes North America, Inc. · Inventors: Otto, Eric; Liu, Jiyin; Xu, Hui
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides methods and compositions for desizing scouring , and bleaching of cellulosic materials which are carried out by contacting the cellulosic materials simultaneously or sequentially in a single-bath process with an enzyme system and a bleaching system comprising hydrogen peroxide or at least one peroxy compound which generates hydrogen peroxide when dissolved in water, or combinations thereof, and at least one bleach activator.
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 July 1, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 1, 2024.
- 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.