Novel enzymatic cellulose derivative hydrolysate and fractions thereof
CA 2009675 C · Owner: Alko Ltd. · Inventors: Timonen, Maritta; Vaara, Martti; Vaara, Timo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water soluble enzymatic hydrolysate of a cellulose derivative and fractions tereof comprising a cellulose derivative hydrolyzed with an enzyme preparation to form a low molecular weight polymer or a mixture of oligomers having an average degree of polymerization in the range of 3 to 300 and a molecular weight of 500 to 100,000: and a method for producing and using such hydrolysates and fractions thereof.
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 9, 1990 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 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.