Herbicide
CA 1058902 A · Owner: Basf Aktiengesellschaft · Inventors: Preugschas, Helmut; Daubach, Ewald; Fischer, Roman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New and valuable herbicide comprising 1-phenyl-4amino-5-chloro (or -5-bromo)-pyridazone-(6) which contains from 10 to 65 weight % of the active ingredient in the form of an aqueous suspension and, as dispersant a condensation product, of sulfonated phenols free from condensed ring systems with urea and formaldehyde in a molar ratio of 1:1 to 1.5:1.7 to 2.2 which condensation product has been after-treated with phenols and formaldehyde. The dispersion is extremely stable even after, prolonged storage periods. It can be readily mixed with other plant protection agents upon dilution. No dust problems occur when the spray liquors are prepared for use.
Read the whole patent
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 July 24, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 24, 1996.
- 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.