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Expired Canadian patentCanada

Thermally stable hot melt moisture-cure polyurethane adhesive composition

CA 1270587 C · Owner: Mackey, Sandra Jean · Inventors: Markevka, Virginia Creedon; Bunnelle, William Lynn; Mackey, Sandra Jean

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

A one-package thermally stable hot melt pressuresensitive moisture-cure polyurethane composition that can be extruded at elevated temperatures to form a hot melt glue line with very high green strength that can moisture-cure to a strong urethane adhesive bond.

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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 June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 19, 1986
GrantedJune 19, 1990
Term endedJune 19, 2007
Patent numberCA 1270587 C
Classification (IPC)C08L31/04 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedDec 19, 1986Patent grantedJune 19, 1990Term endedJune 19, 2007

Sources & verification

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