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Expired European patentEurope

Rotary valve with clearance sealings for feeding bulk material into pneumatic conveyors

EP 0462501 B1 · Applicant: MOTAN VERFAHRENSTECHNIK GMBH & CO.

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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 June 12, 1991 and granted November 30, 1994. A European patent lasts at most 20 years from filing, so its term ended June 12, 2011.
  • 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 December 12, 2016.
  • 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.
FiledJune 12, 1991
PublishedDecember 27, 1991
GrantedNovember 30, 1994
Term endedJune 12, 2011
Application numberEP 91109643
Classification (CPC)B65G53/4633

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 12, 1991PublishedDec 27, 1991Patent grantedNov 30, 1994Term endedJune 12, 2011

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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