Expired European patentEurope
Semiconductor device
EP 0448713 B1 · Applicant: NIPPONDENSO CO., LTD.
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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, and the Claude kit works from them.
Why it's free to use
- Filed July 21, 1989 and granted October 27, 1993. A European patent lasts at most 20 years from filing, so its term ended July 21, 2009.
- 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 January 21, 2015.
- 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.
FiledJuly 21, 1989
PublishedOctober 2, 1991
GrantedOctober 27, 1993
Term endedJuly 21, 2009
Application numberEP 89908519
Classification (CPC)H10W70/611 +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.