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Expired European patentEurope

Gas mixtures and processes for deposition of amorphous semiconductors

EP 0204396 B1 · Applicant: ENERGY CONVERSION DEVICES, INC.

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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.

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Why it's free to use

  • Filed March 17, 1986 and granted August 28, 1991. A European patent lasts at most 20 years from filing, so its term ended March 17, 2006.
  • 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 17, 2011.
  • 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 17, 1986
PublishedDecember 10, 1986
GrantedAugust 28, 1991
Term endedMarch 17, 2006
Application numberEP 86301938
Classification (CPC)H10P14/2922 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 17, 1986PublishedDec 10, 1986Patent grantedAug 28, 1991Term endedMarch 17, 2006

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

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