Modification of starch biosynthetic enzyme gene expression to produce starches in grain crops
CA 2330213 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Broglie, Karen E.; Lightner, Jonathan Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention discloses utilization of a cDNA clone to construct sense and antisense genes for inhibition of starch synthase enzymatic activity in corn. More specifically, this invention concerns a method of controlling the starch fine structure of starch derived from the grain of cereal crops comprising: (1) preparing a chimeric gene comprising a nucleic acid fragment encoding a starch synthase structural gene or a fragment thereof operably , linked in either sense or antisense orientation on the upstream side to a nucleic acid fragment encoding a promoter that directs gene expression in corn endosperm tissue, and operably linked on the downstream side to a nucleic acid …
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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 July 26, 1999 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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.