Sulfurous diurethanes
CA 1110264 A · Owner: Basf Aktiengesellschaft · Inventors: Schirmer, Ulrich; Rohr, Wolfgang; Wuerzer, Bruno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New diurethanes having a herbicidal action, the urethane radicals being attached to a phenyl radical in meta position and at least one of the urethane radicals containing sulfur; herbicides containing these compounds as active ingredients; processes for the preparation of these compounds; and processes for controlling the growth of unwanted plants with these compounds.
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 October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 1998.
- 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.