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Expired European patentEurope

Water-soluble copolymers containing sulfo groups, method for the production and use thereof

EP 1763546 B1 · Applicant: Construction Research and Technology GmbH

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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 30, 2005 and granted March 31, 2010. A European patent lasts at most 20 years from filing, so its term ended June 30, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 30, 2005
PublishedMarch 21, 2007
GrantedMarch 31, 2010
Term endedJune 30, 2025
Application numberEP 05755313
Classification (CPC)C04B24/2688 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedJune 30, 2005PublishedMarch 21, 2007Patent grantedMarch 31, 2010Term endedJune 30, 2025

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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