Expired European patentEurope
Electro-magnetic wave absorbing material
EP 0090432 B1 · Applicant: NEC CORPORATION
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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Read the whole patent
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.
Why it's free to use
- Filed March 31, 1983 and granted October 7, 1987. A European patent lasts at most 20 years from filing, so its term ended March 31, 2003.
- 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 1, 2008.
- 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.
FiledMarch 31, 1983
PublishedOctober 5, 1983
GrantedOctober 7, 1987
Term endedMarch 31, 2003
Application numberEP 83103247
Classification (CPC)C08K3/08 +2 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.