Method for production of native human leukocyte (alpha) interferon
CA 2234396 C · Owner: Bassily, George Sabet · Inventors: Mikhael, Mervat Attalla; Bassily, George Sabet; Galeb, Haider A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the preparation of natural human alfa interferon from human blood by ammonium chloride haemolysis and purification by washing with buffered physiological saline solution, then preparing a suspension in a liquid culture medium and induction by Sendai virus. The process according to the invention is characterized in that leukocytes are separated from human blood purified in a known, way, suspended in a liquid culture medium then induced by Sendai, virus, and the pre-treatment is carried out at 30-40°C 60-90 minutes, after the induction the incubation is continued at 30°C or at a lower temperature, at the end of incubation further quantity of Sendai virus …
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 May 8, 1998 and granted November 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2020.
- 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.