Patent Yard Sign in
Expired European patentEurope

Process and installation for the preparation of calcium hydrogen phosphate

EP 0402596 B1 · Applicant: HOECHST AKTIENGESELLSCHAFT

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 April 24, 1990 and granted June 9, 1993. A European patent lasts at most 20 years from filing, so its term ended April 24, 2010.
  • 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 October 24, 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.
FiledApril 24, 1990
PublishedDecember 19, 1990
GrantedJune 9, 1993
Term endedApril 24, 2010
Application numberEP 90107770
Classification (CPC)C01B25/322

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedApril 24, 1990PublishedDec 19, 1990Patent grantedJune 9, 1993Term endedApril 24, 2010

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.