Expired Canadian patentCanada
Method of preventing the spoilage of bread
CA 919986 A · Owner: Ueno Fine Chemical Industries · Inventors: Toshio Matsuda; Tetsuya Miyazaki; Shigeo Inamine
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 January 30, 1973. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 1990.
- 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—
GrantedJanuary 30, 1973
Term endedJanuary 30, 1990
Patent numberCA 919986 A
Classification (IPC)A21D15/00 +2 more
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.