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Expired Canadian patentCanada

Biaxially-oriented multilayer polyolefin film with a silk-matt finish, process for its preparation and use thereof

CA 2092773 C · Owner: Hoechst Aktiengesellschaft · Inventors: Speith, Angela; Schloegl, Gunter; Murschall, Ursula

CIPO record

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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 multilayer polypropylene film is disclosed that has at least one base layer containing polypropylene and at least one outer layer containing a mixture of two mixture components I and II. Mixture component I is essentially a polypropylene homopolymer or a copolymer of ethylene and propylene or ethylene and butylene or propylene and butylene or ethylene and another a-olefin having 5 to 10 carbon atoms or propylene and another a-olefin having 5 to 10 carbon atoms or a terpolymer of ethylene and propylene and butylene or ethylene and propylene and another a-olefin having 5 to 10 carbon atoms or a mixture of two or more of said homopolymers, copolymers and terpolymers or a blend of two or more …

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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 March 26, 1993 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2015.
  • 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 26, 1993
GrantedMay 13, 2003
Term endedMarch 26, 2013
Patent numberCA 2092773 C
Classification (IPC)B32B27/08 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedMarch 26, 1993Patent grantedMay 13, 2003Term endedMarch 26, 2013

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