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Expired European patentEurope

A method for improving the separation properties of semi-permeable membranes and membranes accordingly improved

EP 0366649 B1 · Applicant: Atlas Copco Aktiebolag

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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 June 25, 1987 and granted June 9, 1993. A European patent lasts at most 20 years from filing, so its term ended June 25, 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 December 25, 2012.
  • 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.
FiledJune 25, 1987
PublishedMay 9, 1990
GrantedJune 9, 1993
Term endedJune 25, 2007
Application numberEP 87904979
Classification (CPC)B01D69/125 +1 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJune 25, 1987PublishedMay 9, 1990Patent grantedJune 9, 1993Term endedJune 25, 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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