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Expired European patentEurope

Process for the separation of contaminant material from contaminated oil

EP 0030805 B1 · Applicant: AMSTED Industries Incorporated

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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 November 27, 1980 and granted September 14, 1983. A European patent lasts at most 20 years from filing, so its term ended November 27, 2000.
  • 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 May 27, 2006.
  • 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.
FiledNovember 27, 1980
PublishedJune 24, 1981
GrantedSeptember 14, 1983
Term endedNovember 27, 2000
Application numberEP 80304268
Classification (CPC)C10M175/0016

Timeline

Timeline From EPO dates

1981198319851987198919911993199519971999Application filedNov 27, 1980PublishedJune 24, 1981Patent grantedSep 14, 1983Term endedNov 27, 2000

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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