A novel protease
CA 2281956 C · Owner: Fujiwara, Takashi · Inventors: Shin, Masaru; Nakamura, Etsuo; Yoshida, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel protease derived from Bacillus licheniformis is provided. The protease cleaves the peptide bonds at the carboxyl termini of glutamic acid residues in polypeptides. The protease contains an amino acid sequence from serine in the +1 position to glutamine in the +222 position of SEQ ID NO: 1.
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 October 23, 1991 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.