Protease inhibitor and process for producing it
CA 2025537 A1 · Owner: Katunuma, Nobuhiko · Inventors: Katunuma, Nobuhiko; Ike, Yoshimasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to methionine trypstatin which is a novel protease inhibitor a gene, encoding its amino acid sequence a plasmid containing, this gene, a microorganism transformed by the plasmid and a process for producing methionine trypstatin using the microorganism. Trypstatin, which has not previously been produced by microorganisms, is produced as methionine trypstatin using a microorganism, by adding methionine to the N terminus of trypstatin, selecting the appropriate DNA from all DNAs that the microorganism can produce and, constructing the plasmid. Methionine trypstatin is promising as an agent for the treatment or prevention of nephritis chronic, articular rheumatism, …
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 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 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.