Protein and production thereof
CA 1290713 C · Owner: Nishimura, Osamu · Inventors: Itoh, Yasuaki; Fujisawa, Yukio; Nishimura, Osamu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A trypsin-like protease-resistant modified P31 protein having hepatitis B virus surface antigen activity and ability to bind polymerized human serum albumin as derived from a hepatitis B virus surface antigen P31 protein by such modification as to render at least one trypsin-like protease sensitive site thereof insensitive can be used as a vaccine for prevention of hepatitis B virus infections and as an antigen for diagnosis of hepatitis B virus infections.
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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.