Expired Canadian patentCanada
Process for selectively compressing granular material in a molding box
CA 1306843 C · Owner: Leutwiler, Hans · Inventors: Leutwiler, Hans; Fischer, Kurt
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Granular material is selectively compressed in a molding box by a series of pressure surges applied over the granular material.
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 September 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 16, 1987
GrantedSeptember 1, 1992
Term endedSeptember 1, 2009
Patent numberCA 1306843 C
Classification (IPC)B22C15/00
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.