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Expired European patentEurope

Electrostatic-charge-differential amplification

EP 0129403 B1 · Applicant: EASTMAN KODAK COMPANY (a New Jersey corporation)

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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 June 13, 1984 and granted December 28, 1988. A European patent lasts at most 20 years from filing, so its term ended June 13, 2004.
  • 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 December 13, 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.
FiledJune 13, 1984
PublishedDecember 27, 1984
GrantedDecember 28, 1988
Term endedJune 13, 2004
Application numberEP 84303996
Classification (CPC)G03G13/22

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedJune 13, 1984PublishedDec 27, 1984Patent grantedDec 28, 1988Term endedJune 13, 2004

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.