Reagent for measuring immature leukocytes
CA 2119390 C · Owner: Hamaguchi, Yukio · Inventors: Tsujino, Yukio; Hamaguchi, Yukio; Morikawa, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reagent for measuring immature leukocytes which com- prises: (1) a polyoxyethylene-based nonionic surfactant having the general formula (I) in a sufficient amount capable of fixing cytoplasms and cell membranes of immature leukocytes: R1-R2-(CH2CH2O)n-H (I) where R1 is an alkyl alkenyl or alkynyl group having 10 to 25 carbon atoms; R2 is -O- -(C6H4)-O- or -COO-; and n is an integer of 10 to 40 (2) a solubilizing agent in a suffi- cient amount capable of damaging cell membranes of blood cells other than immature leukocytes and shrinking them (3) an amino acid in a sufficient amount capable of stabilizing cytoplasm and cell membrane of immature leukocytes and (4) an aqueous medium, which …
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 March 18, 1994 and granted April 8, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2016.
- 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.