Expired European patentEurope
Water-soluble, sulfonic group-containing copolymers and terpolymers, the production thereof and use as stabilizers for aqueous building material systems and water-based painting and coating systems
EP 1678223 B1 · Applicant: Construction Research & Technology GmbH
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.
Why it's free to use
- Filed October 18, 2004 and granted March 7, 2007. A European patent lasts at most 20 years from filing, so its term ended October 18, 2024.
- 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.
FiledOctober 18, 2004
PublishedJuly 12, 2006
GrantedMarch 7, 2007
Term endedOctober 18, 2024
Application numberEP 04790611
Classification (CPC)C04B24/2688 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.