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Expired Canadian patentCanada

Animal feeds containing a mixture of zinc bacitracin and proteolytic enzymes

CA 1099572 A · Owner: Henkel Kommanditgesellschaft Auf Aktien (Henkel Kgaa) · Inventors: Hiller, Gunter

CIPO record

Overview

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Abstract From the Canadian patent

Animal feeds based on carbohydrates protein, and, fats and containing from 5 to 20 ppm of the antibiotic zinc Bacitracin and a content of proteolytic enzymes in such an amount that the enzymatic activity is from 0.05 to 2.5 mTU/gm of said animal feed.

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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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 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.
FiledJuly 20, 1977
GrantedApril 21, 1981
Term endedApril 21, 1998
Patent numberCA 1099572 A
Classification (IPC)A23K1/17 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedJuly 20, 1977Patent grantedApril 21, 1981Term endedApril 21, 1998

Sources & verification

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