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Expired Canadian patentCanada

Method for protecting surfaces of objects or constructions that are exposed to surface-water against growth of biological origin

CA 1111981 A · Owner: M & T Chemicals B.V. · Inventors: De Graaf, Aart P.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention relates to an anti-fouling paint formulation and a method which is suitable for protecting surfaces exposed to water, from biological growths. The paint formulation comprises a water-insoluble polymeric binder, a water-soluble polymer binder and a sparingly watersoluble solid toxicant. The method comprises the application of the paint formulation to the surface of and object or construction.

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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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.
FiledMarch 28, 1978
GrantedNovember 3, 1981
Term endedNovember 3, 1998
Patent numberCA 1111981 A
Classification (IPC)C08K5/56 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMarch 28, 1978Patent grantedNov 3, 1981Term endedNov 3, 1998

Sources & verification

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