Process for preparing osteogenesis promoting substance
CA 2050744 A1 · Owner: Yamazaki, Iwao · Inventors: Yoshida, Keiji; Yamazaki, Iwao; Notoya, Kohei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing an osteogenesis promoting substance, which comprises extracting a demineralized bone powder with a solution of chaotorpic reagent subjecting the, extracted solution to ultrafiltration to collect a fraction containing substances ranging from 1,000 to 100,000 daltons as molecular weight, dialyzing the collected fraction and collecting the water-insoluble fraction from the dialyzing liquid. The osteogenesis promoting substance prepared by the present invention is useful as a bone repairing agent and a bone grafting agent.
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 September 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 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.