Patent Yard Sign in
Expired design patentArchive

Knife

US D643,263 S · Assignee: Sylmark Holdings Limited · Inventors: Spiegel; Peter

USPTO PDF

Overview

The published document from the USPTO: abstract, claims, description. Open it full size

Read the whole patent

Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

Google PatentsUSPTO PDF

Why it's free to use

  • Granted August 16, 2011. A US design patent lasts 14 years from grant (15 if filed from May 13, 2015), so this one ended August 16, 2025.
  • A design patent protects only how a product looks. We check US rights only.
FiledFebruary 10, 2011
GrantedAugust 16, 2011
Term endedAugust 16, 2025
Application numberD/385210
Classification (CPC)—
Length3 pages

Timeline

Timeline From USPTO dates

2012201420162018202020222024Design grantedAug 16, 2011Term endedAug 16, 2025

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

Everything on this page comes from the USPTO record linked above.