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Expired Canadian patentCanada

Stable aqueous suspension of water-insoluble, calcium- binding aluminosilicates and organic suspending agents

CA 1084802 A · Owner: Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) · Inventors: Conrad, Jens; Schnegelberger, Harald; Rupilius, Wolfgang

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Abstract From the Canadian patent

Stable, pumpable aqueous suspensions of water-, insoluble calcium-binding aluminosilicates suitable as stock suspensions comprising (A) from 20% to 55% by weight of at least one finely-divided water-insoluble silicate compound having a calcium-binding power of at least 50 mg CaO/gm of anhydrous active substance and having the formula combined, water not shown, (M2/nO)x - Me2O3 - (Sio2)y where M is a cation of the valence n, exchangeable with calcium x is a number of from 0.7 to 1.5, Me is aliminum or boron and, y is a number from 0.8 to 6, (B) from 0.2% to 5% by weight of at least one organic dispersing agent as follows: (1) lower alkylene oxide or glycide adducts of an N-higher …

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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 September 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 3, 1977
GrantedSeptember 2, 1980
Term endedSeptember 2, 1997
Patent numberCA 1084802 A
Classification (IPC)B01F3/08 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedFeb 3, 1977Patent grantedSep 2, 1980Term endedSep 2, 1997

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