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Expired Australian patentAustralia

Isomerisation catalyst using molybdenum/tungsten compound

AU 1981073080 · Applicant: Shell Internationale Research Maatschappij Bv

AusPat record

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Its specification, documents and status are on IP Australia's AusPat.

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Listed from its IP Australia record in Patent Yard's archive of Australian patents past their term. Its claims, description and drawings are in the AusPat record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed July 17, 1981 and granted January 24, 1985. An Australian standard patent lasts 20 years from its date of patent, which is at most a year after this filing, so its term ended by July 17, 2002.
  • A pharmaceutical extension adds at most five years, so even that would have ended by July 17, 2007.
  • We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 17, 1981
GrantedJanuary 24, 1985
Term ended byJuly 17, 2002
Application numberAU 1981073080
Classification (IPC)C07C5/22 +2 more

Timeline

Timeline From IP Australia dates

1982198519881991199419972000Application filedJuly 17, 1981Patent grantedJan 24, 1985Term ended byJuly 17, 2002

Sources & verification

Everything on this page comes from the IP Australia record linked above. Data from IP Australia's IPGOD, licensed under CC BY 2.5 AU.