Patent Yard Sign in
Expired European patentEurope

Process for enzymatic pretreatment of drill cuttings

EP 0712809 B1 · Applicant: ELF AQUITAINE PRODUCTION

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed November 20, 1995 and granted August 27, 1997. A European patent lasts at most 20 years from filing, so its term ended November 20, 2015.
  • 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 20, 2021.
  • 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 20, 1995
PublishedMay 22, 1996
GrantedAugust 27, 1997
Term endedNovember 20, 2015
Application numberEP 95402598
Classification (CPC)C02F3/342

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedNov 20, 1995PublishedMay 22, 1996Patent grantedAug 27, 1997Term endedNov 20, 2015

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.