Expired Canadian patentCanada
Recovery of urea from off-gases from the synthesis of melamine from urea in the gas phase which have been freed from melamine
CA 769080 A · Owner: Badische Anilin- And Soda-Fabrik Aktiengesellschaft · Inventors: Matthias Schwarzmann; Hermann D. Fromm; Ludwig Vogel
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 October 10, 1967. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 10, 1984.
- 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—
GrantedOctober 10, 1967
Term endedOctober 10, 1984
Patent numberCA 769080 A
Classification (IPC)C07C
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.