Patent Yard Sign in
Expired European patentEurope

General packing of expanded graphite and its packing material

EP 0388481 B1 · Applicant: ZHEJIANG CI XI SEAL MATERIAL FACTORY

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed March 20, 1989 and granted March 15, 1995. A European patent lasts at most 20 years from filing, so its term ended March 20, 2009.
  • 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 September 20, 2014.
  • 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.
FiledMarch 20, 1989
PublishedSeptember 26, 1990
GrantedMarch 15, 1995
Term endedMarch 20, 2009
Application numberEP 89104944
Classification (CPC)C04B35/536 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedMarch 20, 1989PublishedSep 26, 1990Patent grantedMarch 15, 1995Term endedMarch 20, 2009

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.