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Expired Canadian patentCanada

Air-entraining adjuvant containing blood plasma as a substitute for synthetic colloid, and products obtained

CA 1330809 C · Owner: Cazalens, Georges · Inventors: Cazalens, Georges

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Abstract From the Canadian patent

Air-entraining adjuvant containing blood plasma as a substitute for synthetic colloid and products obtained, The present invention relates to an airentraining adjuvant. This adjuvant comprises animal whole blood and/or cruor serving as the actual air-entraining agent and, also comprises blood plasma as a stabilizer for the ontrained air, preferably in pulverulent or atomized form. The proportion of blood plasma in the adjuvant is advantageously from 15 to 25% by weight. The said adjuvant also contains dispersants of the bentonite type and/or aluminomagnesium clay type. This gives an adjuvant having an exceptional airentraining capacity with a high stability; it is easy to work with as any …

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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 19, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 2011.
  • 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 25, 1989
GrantedJuly 19, 1994
Term endedJuly 19, 2011
Patent numberCA 1330809 C
Classification (IPC)C04B24/14 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 25, 1989Patent grantedJuly 19, 1994Term endedJuly 19, 2011

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