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Expired Canadian patentCanada

Method and apparatus for the blending of granular materials

CA 1134810 A · Owner: Union Carbide Corporation · Inventors: Yi, Kenneth C.; Lee, Jannan G.; Hagerty, Robert O.

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Abstract From the Canadian patent

12,449-1, METHOD AND APPARATUS FOR THE BLENDING OF GRANULAR MATERIALS, ABSTRACT Gravity flow blending system for granular materials by use of novel internal handling means which provides for a continuous, uniform withdrawal of material from a multitude of locations in a large capacity bin. The invention utilizes basic principles of solids rheology to provide for a natural internal self-regulation which makes it possible to use this system for a wide range of material discharge rates ant granular material types. This is a continuation-in-part of our prior copending application Serial No. 038738 filed May 14 1979, and entitled "Method and Apparatus for the Blending of Granular Materials.", …

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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 November 2, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 6, 1980
GrantedNovember 2, 1982
Term endedNovember 2, 1999
Patent numberCA 1134810 A
Classification (IPC)B01F15/02 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedMay 6, 1980Patent grantedNov 2, 1982Term endedNov 2, 1999

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.