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Expired European patentEurope

Photosensitive stripping material and process for obtaining a photoresist stencil

EP 0105421 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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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 September 22, 1983 and granted June 8, 1988. A European patent lasts at most 20 years from filing, so its term ended September 22, 2003.
  • 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 March 22, 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.
FiledSeptember 22, 1983
PublishedApril 18, 1984
GrantedJune 8, 1988
Term endedSeptember 22, 2003
Application numberEP 83109447
Classification (CPC)G03F7/115 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 22, 1983PublishedApril 18, 1984Patent grantedJune 8, 1988Term endedSep 22, 2003

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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