Process for preparing an improved western blot immunoassay
CA 2016313 C · Owner: Schulze, Werner · Inventors: Robey, William Gerard; Schulze, Werner; Chan, Emerson W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention encompasses an improved immunoassay method which involves the simultaneous transfer of multiple antigens onto a single solid support. The antigens which may be utilized by this method may be either naturally or recombinantly produced arid may be purified on a variety of electrophoresis gels. This method is particularly useful to provide an extremely sensitive multiple component assay using essentially pure antigenic polypeptides capable of detecting the presence of antibodies to HIV-1 or HIV-2 viruses in infected patients.
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, 1990 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2012.
- 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.