Expired Canadian patentCanada
Mechanical means for increasing the grade of a flotation cell concentrate
CA 1099035 A · Owner: Allis-Chalmers Corporation · Inventors: Moore, Donald C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flotation cell having a submerged screen for breaking up mineral-laden air bubbles to reduce refuse entrainment and a rotating rake to breakup the surface froth to return mechanically entrapped refuse which has escaped the screen.
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 April 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 7, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 25, 1978
GrantedApril 7, 1981
Term endedApril 7, 1998
Patent numberCA 1099035 A
Classification (IPC)B03D1/16 +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.