Expired Canadian patentCanada
Plant for the dry granulation for metallurgical slag and for preheating air with the heat of this slag
CA 904579 A · Owner: Gosudarstvenny Nauchno-Issledovatelsky Institut Tsvetnykh Metallov "Gintsvetmet" · Inventors: Zalman L. Berlin; Valery P. Chupyatov; Boris N. Zakharov
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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 July 11, 1972. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 1989.
- 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—
GrantedJuly 11, 1972
Term endedJuly 11, 1989
Patent numberCA 904579 A
Classification (IPC)C21B3/06 +1 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.