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Expired Canadian patentCanada

Waterborne coating compositions

CA 2217875 C · Owner: Eastman Chemical Company · Inventors: Taylor, James Wayne; Salisbury, James Russell

CIPO record

Overview

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

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Abstract From the Canadian patent

This invention provides latex compositions prepared using, for example, both acetoacetoxyethyl methacrylate (AAEM) and t-butylaminoethyl methacrylate (t-BAMA) which when applied to a pre-coated substrate possess out-, standing wet adhesion when compared to waterborne polymers containing either AAEM or t-butylaminoethyl methacrylate alone. The latex compositions of this invention continue to exhibit superior wet adhesion after storage at room temperature for one year. The latex compositions are thus particularly useful in coating compositions, especially coating bare or previously-coated metals, paper, plastics wood, textiles, and in adhesives.

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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

  • Filed April 12, 1996 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 12, 1996
GrantedDecember 31, 2002
Term endedApril 12, 2016
Patent numberCA 2217875 C
Classification (IPC)C08F8/00 +1 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedApril 12, 1996Patent grantedDec 31, 2002Term endedApril 12, 2016

Sources & verification

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