Purified guaiacum resin and method for making the same
CA 1320193 C · Owner: Kuroda, Kohji · Inventors: Fujita, Yoshiko; Kuroda, Kohji; Watanabe, Masanao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A purified guaiacum resin which is obtained by isolation from a natural guaiacum resin with chromatography using a gel for reversed chromatography as a stationary phase and a polar solvent as a mobile phase. The purified guaiacum resin does not contain substances causing the repellency of a specimen or constituents exhibiting unstable color development when it is used as a body fluid inspection agent and is subjected to color reaction in the presence of a peroxidase and hydrogen peroxide.
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
- Granted July 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 13, 2010.
- 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.