Expired Canadian patentCanada
Combating arthropods with o-alkyl-o-(2-cyclopropyl-6- methyl-pyrimidin-4-yl)-thionophosphonic acid esters
CA 1108141 A · Owner: Bayer Aktiengesellschaft · Inventors: Behrenz, Wolfgang; Maurer, Fritz; Schroder, Rolf
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O-Alkyl-O-(2-cyclopropyl-6-methyl-pyrimidin-4-yl)thionophosphonic acid esters of the formula in which, R is alkyl, and, R1 is alkyl or phenyl which possess arthropodicidal properties.
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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
- Granted September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
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FiledJuly 13, 1979
GrantedSeptember 1, 1981
Term endedSeptember 1, 1998
Patent numberCA 1108141 A
Classification (IPC)C07F9/40 +2 more
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.