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Expired European patentEurope

Parenchymal cell cellulose and related materials, and a method of producing the same

EP 0102829 B1 · Applicant: Weibel, Michael K.

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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 1, 1983 and granted November 25, 1987. A European patent lasts at most 20 years from filing, so its term ended September 1, 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 1, 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 1, 1983
PublishedMarch 14, 1984
GrantedNovember 25, 1987
Term endedSeptember 1, 2003
Application numberEP 83305043
Classification (CPC)C08B1/00 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedSep 1, 1983PublishedMarch 14, 1984Patent grantedNov 25, 1987Term endedSep 1, 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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