Expired European patentEurope
Use of acrylic acid copolymer for combating particulate matter formation and dispersing particulate matter in an aqueous system
EP 0123482 B1 · Applicant: ROHM AND HAAS COMPANY
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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 April 13, 1984 and granted December 17, 1986. A European patent lasts at most 20 years from filing, so its term ended April 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 October 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.
FiledApril 13, 1984
PublishedOctober 31, 1984
GrantedDecember 17, 1986
Term endedApril 13, 2004
Application numberEP 84302527
Classification (CPC)C02F5/10
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.