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Expired Canadian patentCanada

Uracil derivatives and herbicides containing the same as active ingredient

CA 2021005 C · Owner: Watanabe, Shigeomi · Inventors: Itoh, Kaoru; Suzuki, Koichi; Satow, Jun

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Disclosed herein is uracil derivatives having a haloalkyl group at the 5-position and a phenyl group at the 2-position which has a specific substituent which, are represented by the formula (I): (see formula I), These compounds show penetrative translocation activity and a very high herbicidal activity, in which as compared with the conventional herbicidal compounds the said uracil derivatives can be applied for either soil treatment or foliage treatment, thereby producing a quick and high herbicidal effect even at a very low dosage against a large variety of weeds including perennial weeds, and have the property to residual effect for an appropriate period of time.

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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 12, 1990 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.
FiledJuly 12, 1990
GrantedJanuary 25, 2000
Term endedJuly 12, 2010
Patent numberCA 2021005 C
Classification (IPC)C07D239/46 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJuly 12, 1990Patent grantedJan 25, 2000Term endedJuly 12, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.