Expired European patentEurope
A buoyant carbonaceous fibrous structure coated with a water insoluble hydrophobic material
EP 0331819 B1 · Applicant: THE DOW CHEMICAL 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 October 21, 1988 and granted September 27, 1995. A European patent lasts at most 20 years from filing, so its term ended October 21, 2008.
- 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 21, 2014.
- 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 21, 1988
PublishedSeptember 13, 1989
GrantedSeptember 27, 1995
Term endedOctober 21, 2008
Application numberEP 88202359
Classification (CPC)D01F11/14
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.