Expired Canadian patentCanada
Dispersion dyestuffs and a process for their manufacture
CA 712595 A · Owner: Farbwerke Hoechst Aktiengesellschaft Vormals Meister Lucius And Bruning · Inventors: Otto Fuchs; Heinz Rentel
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 June 29, 1965. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 1982.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 29, 1965
Term endedJune 29, 1982
Patent numberCA 712595 A
Classification (IPC)C09B
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.