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Expired European patentEurope

Combined piston-expander compressor

EP 1812759 B1 · Applicant: Technische Universität Dresden

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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 October 29, 2005 and granted November 18, 2009. A European patent lasts at most 20 years from filing, so its term ended October 29, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledOctober 29, 2005
PublishedAugust 1, 2007
GrantedNovember 18, 2009
Term endedOctober 29, 2025
Application numberEP 05815530
Classification (CPC)F04B35/00 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 29, 2005PublishedAug 1, 2007Patent grantedNov 18, 2009Term endedOct 29, 2025

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.