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Expired European patentEurope

Reforming using a bound zeolite catalyst

EP 0451138 B1 · Applicant: CHEVRON CHEMICAL COMPANY

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

Why it's free to use

  • Filed January 4, 1989 and granted March 20, 1996. A European patent lasts at most 20 years from filing, so its term ended January 4, 2009.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by July 4, 2014.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJanuary 4, 1989
PublishedOctober 16, 1991
GrantedMarch 20, 1996
Term endedJanuary 4, 2009
Application numberEP 89901788
Classification (CPC)C10G35/095 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJan 4, 1989PublishedOct 16, 1991Patent grantedMarch 20, 1996Term endedJan 4, 2009

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