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Heat exchanger

US D280,546 S · Assignee: Nisshin Chemical Industry Co., Ltd. · Inventors: Fukumoto; Masafumi

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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.

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Why it's free to use

  • Granted September 10, 1985. A US design patent lasts 14 years from grant (15 if filed from May 13, 2015), so this one ended September 10, 1999.
  • A design patent protects only how a product looks. We check US rights only.
FiledJuly 29, 1982
GrantedSeptember 10, 1985
Term endedSeptember 10, 1999
Application number06/403181
Classification (CPC)—
Length6 pages

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

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