Expired Canadian patentCanada
Method for controlling algae
CA 1181253 A · Owner: Stauffer Chemical Company · Inventors: Gutman, Arnold D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract Algae are controlled or inhibited by application of an algicidally effective amount of the compound 3-(4-tolylslfonyl)acrylonitrile.
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 January 22, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 12, 1982
GrantedJanuary 22, 1985
Term endedJanuary 22, 2002
Patent numberCA 1181253 A
Classification (IPC)A01N37/34
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.