Expired European patentEurope
Control information communication arrangement for a time division switching system
EP 0116558 B1 · Applicant: Western Electric Company, Incorporated
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 March 21, 1983 and granted August 27, 1986. A European patent lasts at most 20 years from filing, so its term ended March 21, 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 September 21, 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 21, 1983
PublishedAugust 29, 1984
GrantedAugust 27, 1986
Term endedMarch 21, 2003
Application numberEP 83901481
Classification (CPC)H04Q11/0407
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.