Regulatory element conferring tapetum specificity
CA 2188280 C · Owner: Pioneer Hi-Bred International, Inc. · Inventors: Huffman, Gary A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel DNA regulatory element that confers anther tapetum-specific expression has been discovered isolated, and characterized. The tapetum-specific regulatory element can be used to control the expression of a foreign gene that disrupts the function of tapetal cells. Thus the control of maize pollen production can be achieved by using the tapetum-specific regulatory element to produce male-sterile plants. Various methods can be used to restore male fertility in the F1 generation of such male-sterile plants.
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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 April 20, 1995 and granted April 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2017.
- 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.