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Expired European patentEurope

Aqueous stable suspensions of water-insoluble silicates, capable of binding calcium ions, and their use for the production of washing and cleaning agents

EP 0183945 B1 · Applicant: Degussa Aktiengesellschaft

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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 October 11, 1985 and granted January 2, 1991. A European patent lasts at most 20 years from filing, so its term ended October 11, 2005.
  • 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 April 11, 2011.
  • 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 11, 1985
PublishedJune 11, 1986
GrantedJanuary 2, 1991
Term endedOctober 11, 2005
Application numberEP 85112884
Classification (CPC)C11D3/1286

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedOct 11, 1985PublishedJune 11, 1986Patent grantedJan 2, 1991Term endedOct 11, 2005

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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