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Expired European patentEurope

Oxygen partial pressure controller for a pressure swing adsorption system

EP 0118679 B1 · Applicant: LITTON SYSTEMS, INC.

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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 January 18, 1984 and granted May 31, 1989. A European patent lasts at most 20 years from filing, so its term ended January 18, 2004.
  • 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 18, 2009.
  • 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 18, 1984
PublishedSeptember 19, 1984
GrantedMay 31, 1989
Term endedJanuary 18, 2004
Application numberEP 84100515
Classification (CPC)G05D16/2093 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedJan 18, 1984PublishedSep 19, 1984Patent grantedMay 31, 1989Term endedJan 18, 2004

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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