Patent Yard Sign in
Expired European patentEurope

Process camera

EP 0552823 B1 · Applicant: HIRAKAWA KOGYOSHA CO., LTD.

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 October 31, 1989 and granted April 16, 1997. A European patent lasts at most 20 years from filing, so its term ended October 31, 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 May 1, 2015.
  • 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.
FiledOctober 31, 1989
PublishedJuly 28, 1993
GrantedApril 16, 1997
Term endedOctober 31, 2009
Application numberEP 93105940
Classification (CPC)G03B27/323 +2 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedOct 31, 1989PublishedJuly 28, 1993Patent grantedApril 16, 1997Term endedOct 31, 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.