Expired European patentEurope
A silver containing thick film conductor composition, a method for producing such a composition, a method of preparing a solar cell comprising screen printing said composition on an n-type layer of a semiconductor wafer and the solar cells thus obtained
EP 0024775 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
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 August 29, 1980 and granted May 9, 1984. A European patent lasts at most 20 years from filing, so its term ended August 29, 2000.
- 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 March 1, 2006.
- 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 29, 1980
PublishedMarch 11, 1981
GrantedMay 9, 1984
Term endedAugust 29, 2000
Application numberEP 80200814
Classification (CPC)C03C14/006 +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.