Hepatitis a virus cell culture in vitro
CA 1135621 A · Owner: Merck & Co. Inc. · Inventors: Hilleman, Maurice R.; Provost, Philip J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hepatitis A virus is passaged at least once in a susceptible sub-human primate; the infected liver from such passage is used to inoculate an in vitro cell culture, the inoculated cell culture is incubated until hepatitis A antigen is detected in the cell sheet or culture fluid, and at least two serial in vitro passages in cell culture are carried out. The hepatitis A virus so modified can be used to prepare live, attenuated hepatitis A vaccine or an inactivated hepatitis A vaccine.
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 November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.