Thermally stable cytosine deaminase
CA 2018273 C · Owner: Linsley, Peter · Inventors: Marquardt, Hans; Su, Peter C.; Linsley, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermally stable cytosine deaminase (CDase) and the, gene coding therefor, is disclosed as well as methods of isolating, purifying, and recombinantly producing the same. The thermally stable CDase can be isolated from Saccharomyces cerevisiae. The yeast isolated enzyme has a molecular weight of approximately 32 kDa, as determined by gel filtration chromatography, and is composed of two subunits each with a, molecular weight of about 17 kDa. Thermally stable yeast CDase so purified shows no significant sequence homology with other known sequenced proteins.
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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 June 5, 1990 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.