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Expired Canadian patentCanada

Process for obtaining phosphorus from aqueous suspension of phosphorus slime

CA 1295282 C · Owner: Kim, Klim A. · Inventors: Atabaev, Mukan D.; Zhurinov, Murat Z.; Baeshov, Abduali

CIPO record

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Abstract From the Canadian patent

Abstract, A process for obtaining phosphorus from an aqueous suspension of a phosphorus slime comprising subjecting the aqueous suspension to at least one electric discharge of an energy of from 20 to 180 J as calculated per kg of the phosphorus slime in a DC electric field, or the aqueous suspension of the phosphorus slime is subjected to the effect of an AC electric field with a power of 85-250 W. The process is conducted at a temperature not below the melting point of phosphorus.

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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 February 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 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 15, 1986
GrantedFebruary 4, 1992
Term endedFebruary 4, 2009
Patent numberCA 1295282 C
Classification (IPC)C01B25/02 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 15, 1986Patent grantedFeb 4, 1992Term endedFeb 4, 2009

Sources & verification

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