Collagenase inhibitor
CA 2123104 A1 · Owner: Tanzawa, Kazuhiko · Inventors: Kobayashi, Tomowo; Sugimura, Yukio; Tanzawa, Kazuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Constitution: a novel compound represented by general formula (I), wherein R1 represents -OR3(R3 being H or alkyl) -NR4R5(R4 and R5 being each H, alkyl or alkoxy) -NHCH(R6)COR7 (R6 being H or alkyl, and R7 being alkyl) -NHCH(R6)COOR8(R8 being alkyl) or -NHCH(R6)CONR9R10(R9 and R10 being each H or alkyl, or alternatively NR9R10 being a heterocyclic group as a whole); and R2 represents H alkyl or, aralkyl. Effect: since the compound has an inhibitory activity type IV collagenase, it is useful as an inhibitor against vascularization, cancer infiltration or cancer metastasis.
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 November 2, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2014.
- 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.