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AU 1994059092 · Applicant: Baker Hughes Incorporated

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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 March 25, 1994 and granted January 15, 1998. 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 March 25, 2015.
  • A pharmaceutical extension adds at most five years, so even that would have ended by March 25, 2020.
  • We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1994
GrantedJanuary 15, 1998
Term ended byMarch 25, 2015
Application numberAU 1994059092
Classification (IPC)E21B23/00 +2 more

Timeline

Timeline From IP Australia dates

1995199820012004200720102013Application filedMarch 25, 1994Patent grantedJan 15, 1998Term ended byMarch 25, 2015

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.