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Expired European patentEurope

Developing system and a method of using the developing system for detection of carboxylic acids

EP 0341249 B1 · Applicant: LITMUS CONCEPTS, INC.

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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 14, 1987 and granted July 13, 1994. A European patent lasts at most 20 years from filing, so its term ended December 14, 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 14, 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 14, 1987
PublishedNovember 15, 1989
GrantedJuly 13, 1994
Term endedDecember 14, 2007
Application numberEP 88900528
Classification (CPC)G01N33/52

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 14, 1987PublishedNov 15, 1989Patent grantedJuly 13, 1994Term endedDec 14, 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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