Patent Yard Sign in
Expired European patentEurope

MOS i/o protection using switched body circuit design

EP 0305937 B1 · Applicant: NATIONAL SEMICONDUCTOR CORPORATION

EPO PDF

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed August 27, 1988 and granted May 19, 1993. A European patent lasts at most 20 years from filing, so its term ended August 27, 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 February 27, 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.
FiledAugust 27, 1988
PublishedMarch 8, 1989
GrantedMay 19, 1993
Term endedAugust 27, 2008
Application numberEP 88114012
Classification (CPC)H03K19/00315 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 27, 1988PublishedMarch 8, 1989Patent grantedMay 19, 1993Term endedAug 27, 2008

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.