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Expired European patentEurope

Method and system for compromise Greenfield preambles for 802.11N

EP 1693972 B1 · Applicant: Broadcom Corporation

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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 18, 2005 and granted August 26, 2009. A European patent lasts at most 20 years from filing, so its term ended October 18, 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 18, 2005
PublishedAugust 23, 2006
GrantedAugust 26, 2009
Term endedOctober 18, 2025
Application numberEP 05022705
Classification (CPC)H04L67/147 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedOct 18, 2005PublishedAug 23, 2006Patent grantedAug 26, 2009Term endedOct 18, 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

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