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Expired Canadian patentCanada

Multilevel embossing of foamed-sheet materials

CA 1091993 A · Owner: Armstrong World Industries, Inc. · Inventors: Mcquate, William M.; Lewicki, Walter J. Jr.

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

Abstract of the Disclosure, The process herein is used for achieving multilevel mechanical embossing of an expanded foam having a fused or cured wear layer in register with a print on the foam. The expansion of the decorative foam and fusion of the wear layer are carried out and then the back of the foam is cooled by back wetting with or without drum cooling. The wear layer is maintained at a high temperature for embossing and is embossed with registry between the embossed pattern and the printed pattern on the foam.

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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 December 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 29, 1976
GrantedDecember 23, 1980
Term endedDecember 23, 1997
Patent numberCA 1091993 A
Classification (IPC)D06N3/18 +2 more

Timeline

Timeline From CIPO dates

1977198019831986198919921995Application filedJan 29, 1976Patent grantedDec 23, 1980Term endedDec 23, 1997

Sources & verification

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