Cellulase, method for producing the same and use thereof
CA 2047613 A1 · Owner: Seko, Masahiko · Inventors: Saito, Kiyoshi; Seko, Masahiko; Masatsuji, Eiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cellulase having the following properties: (1) an optimum pH of from 9.5 to 10.5 as measured using carboxymethylcellulose as a substrate; (2) a stable pH of from 6 to 11 as measured using carboxymethylcellulose as a substrate after treating at 30°C and for 30 minutes; (3) an optimum temperature of about 55°C as measured using carboxymethylcellulose as a substrate; (4) influence of a surfactant being such that residual activity is 90 % or more after treatment at 30°C and pH of 9.0 for 2 hours in the presence of a sodium n-alkylbenzenesulfonate; (5) a molecular weight of 52,000 ? 2,000 as measured by electrophoresis on SDS-polyacrylamide gel; and (6) an isoelectric point of 4.2 + 0.2 as …
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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 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2013.
- 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.