Herbicidal acetals and ketals
CA 1233817 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Levitt, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title, HERBICIDAL ACETALS AND KETALS, Abstract of the Disclosure This invention relates to novel furan- and thiophenesulfonamides such as 3-(1,3-dioxolan-2-yl)-N- (4-methoxy-6-methyl-1,3-5-triazin-2-yl)aminocarbonyl- 2-thiophenesulfonamide and N-(4,6-dimethoxypyrimidin- 2-yl)aminocarbonyl-3-(1,3-dioxolan-2-yl)-2-thiophenesulfonamide which are highly active pre-emergent and/or post-emergent herbicides. More specifically the, herbicides are of the formula:, I wherein, Q is , Q-1 Q-2 Q-3, Q-4 Q-5 Q-6 or, Q-7 Q-8 Q-9, Q-10, R is H or CH3;, R1 is or , ;, E is CH2 or a single bond;, R2 is H C1-C2 alkyl or Cl;, R3 is H, C1-C3 alyl or C1-C3 alkoxy; R4 and R5 are independently C1-C3 alkyl; R6 and …
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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- 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.