Oncopterin, a pteridine compound useful as a diagnostic agent for cancerogenic diseases
CA 2100136 A1 · Owner: Sugimoto, Takashi · Inventors: Teradaira, Ryo; Ogiwara, Shoji; Nagatsu, Toshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a cancer-specific diagnostic agent. The diagnostic agent is a 2-(3-aminopropyl)amino-4hydroxy-6-(1'R,2')-1',2'-dihydroxypropyl pteridine compound and is referred to as oncopterin. The invention also relates to the use of the compound as a substance for quantitatively determining the diagnostic agent as well as to detection and purification methods for the diagnostic agent. The indicated diagnostic agent is more specific than known cancer indicators and makes possible routine detection on a micro scale from any body fluid, particularly urine.
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 July 8, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2015.
- 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.