High expression modules containing two or more tandem copies of a methioninase encoding sequence
CA 2299282 C · Owner: Tan, Yuying · Inventors: Tan, Yuying
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The construction of multicopy expression systems for methioninase are disclosed. The higher expression systems employ a promoter operably linked to two or more copies of a tandemly repeated methioninase encoding sequence. Such multicopy expression systems were found to produce unexpectedly high levels of methioninase when expressed in an appropriate host.
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 August 5, 1998 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 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.