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Expired European patentEurope

Multi-channel plasma discharge endpoint detection system and method

EP 0458324 B1 · Applicant: APPLIED MATERIALS 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 May 23, 1991 and granted August 26, 1998. A European patent lasts at most 20 years from filing, so its term ended May 23, 2011.
  • 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 November 23, 2016.
  • 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.
FiledMay 23, 1991
PublishedNovember 27, 1991
GrantedAugust 26, 1998
Term endedMay 23, 2011
Application numberEP 91108332
Classification (CPC)H01J37/32935

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMay 23, 1991PublishedNov 27, 1991Patent grantedAug 26, 1998Term endedMay 23, 2011

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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