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Expired Canadian patentCanada

Self-supporting composite plate, especially for double floors

CA 1251944 A · Owner: Mero-Werke Dr.-Ing. Max Mengeringhausen Gmbh & Co. · Inventors: Radtke, Manfred

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

A self-supporting composite plate for double floors or the like, comprising a pan-shaped wrapper for receiving therein a flowable and hardenable filler material of high compression resistance when in a hardened state such as anhydrite, or concrete. The pan-shaped wrapper comprises a plurality of downwardly extending burl-like projecting blocks containing the filler material. A base element of high tensile strength is connected to the projecting blocks.

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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 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 23, 1985
GrantedApril 4, 1989
Term endedApril 4, 2006
Patent numberCA 1251944 A
Classification (IPC)E04B5/16 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedAug 23, 1985Patent grantedApril 4, 1989Term endedApril 4, 2006

Sources & verification

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