Patent Yard Sign in
Expired design patentArchive

Heat exchanger

US D280,545 S · Assignee: Nisshin Chemical Industry Co., Ltd. · Inventors: Fukumoto; Masafumi

USPTO PDF

Overview

4 drawing sheets

Every sheet is in the USPTO PDF.

Open the USPTO PDF

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 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 number06/403180
Classification (CPC)—
Length5 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

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