Expired European patentEurope
Curved element of predetermined curve length forming part of a pipe joint, and curved element building system
EP 0117540 B1 · Applicant: HEWI Heinrich Wilke GmbH
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 February 23, 1984 and granted May 20, 1987. A European patent lasts at most 20 years from filing, so its term ended February 23, 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 August 23, 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.
FiledFebruary 23, 1984
PublishedSeptember 5, 1984
GrantedMay 20, 1987
Term endedFebruary 23, 2004
Application numberEP 84101931
Classification (CPC)E04B1/58
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.