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Expired European patentEurope

Method for producing nitrogen trifluoride by gas-solid reaction

EP 0959040 B1 · Applicant: Central Glass Company, Limited

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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 20, 1999 and granted August 6, 2003. A European patent lasts at most 20 years from filing, so its term ended May 20, 2019.
  • 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 20, 2024.
  • 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 20, 1999
PublishedNovember 24, 1999
GrantedAugust 6, 2003
Term endedMay 20, 2019
Application numberEP 99109947
Classification (CPC)C01B21/0832

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedMay 20, 1999PublishedNov 24, 1999Patent grantedAug 6, 2003Term endedMay 20, 2019

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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