Tablet of isotope-labeled urea
CA 2234245 A1 · Owner: Ito, Kunio · Inventors: Miura, Shigemitsu; Sakato, Kuniaki; Ito, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tablets comprising isotopic urea and an inorganic compound. Tableting a mixture of the urea with one or more inorganic compounds (additives) can inhibit the adhesion due to cohesiveness of urea and can give tablets having a practical disintegration time and sufficiently high hardness. The tablets are useful for the diagnosis of infections with urease-producing microorganisms containing isotopic urea, particularly the one with Helicobacter pylori.
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 August 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2019.
- 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.