Mutant e.coli strains, and their use for producing recombinant polypeptides
CA 2339746 C · Owner: Centre National De La Recherche Scientifique · Inventors: Dreyfus, Marc; Lopez, Pascal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the use of Escherichia coli (E. coli) strains whereof the gene coding for the Rnase E comprises a mutation such that the enzyme produced when said mutated gene is expressed no longer has a degrading activity on mRNA said mutation more significantly not affecting the growth of said E. coli strains for implementing a method for producing specific exogenous recombinant polypeptides.
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 July 29, 1999 and granted May 10, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2021.
- 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.