Anticoagulating substance and preparation process thereof
CA 1297634 C · Owner: Arai, Koichi · Inventors: Yoshizaki, Hideo; Arai, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A human placenta-derived anticoagulating substance is prepared by homogenizing a human placenta subjecting the resulting homogenate to centrifugal separation, extracting the thus-obtained sediment with a chelating agent, and then separating and purifying the extract. The substance has a molecular weight of 73,000 ? 2,000 as measured in reduced and non-reduced states by SDS-polyacrylamide gel electrophoresis. Its isoelectric point ranges from 6.2 to 6.6 as measured by isoelectric column electrophoresis using an ampholyte. It is inactivated by a heat treatment at 50°C for 30 minutes, is stable in a pH range of 5.5 - 8.5 (37°C) and is also stable in plasma at 37°C for 15 minutes. It can …
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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
- Granted March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.