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Expired European patentEurope

Synthesis of vanadium/propylene glycol complexes

EP 0321612 B1 · Applicant: TEXACO DEVELOPMENT CORPORATION

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Overview

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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.

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Why it's free to use

  • Filed December 8, 1987 and granted March 18, 1992. A European patent lasts at most 20 years from filing, so its term ended December 8, 2007.
  • 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 June 8, 2013.
  • 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.
FiledDecember 8, 1987
PublishedJune 28, 1989
GrantedMarch 18, 1992
Term endedDecember 8, 2007
Application numberEP 87310763
Classification (CPC)B01J31/0212 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 8, 1987PublishedJune 28, 1989Patent grantedMarch 18, 1992Term endedDec 8, 2007

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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