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Expired Australian patentAustralia

371115-tetra methyl-2-461014-hexadecapenta enoic acid

AU 1981069159 · Applicant: Eisai Co Ltd

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 April 7, 1981 and granted October 18, 1984. 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 April 7, 2002.
  • A pharmaceutical extension adds at most five years, so even that would have ended by April 7, 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.
FiledApril 7, 1981
GrantedOctober 18, 1984
Term ended byApril 7, 2002
Application numberAU 1981069159
Classification (IPC)C07C69/587 +2 more

Timeline

Timeline From IP Australia dates

1982198519881991199419972000Application filedApril 7, 1981Patent grantedOct 18, 1984Term ended byApril 7, 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.