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Expired Australian patentAustralia

Preparing acrylamide crystals

AU 1986056303 · Applicant: Mitsui Chemicals Inc

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 17, 1986 and granted August 18, 1988. 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 17, 2007.
  • A pharmaceutical extension adds at most five years, so even that would have ended by April 17, 2012.
  • 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 17, 1986
GrantedAugust 18, 1988
Term ended byApril 17, 2007
Application numberAU 1986056303
Classification (IPC)C07C231/24 +2 more

Timeline

Timeline From IP Australia dates

1987199019931996199920022005Application filedApril 17, 1986Patent grantedAug 18, 1988Term ended byApril 17, 2007

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.