Patent Yard Sign in
Expired Canadian patentCanada

Box construction

CA 810357 A · Owner: Silverman, Nordau · Inventors: Silverman, Nordau

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Google PatentsCIPO record

Why it's free to use

  • Granted April 15, 1969. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1986.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 28, 1968
GrantedApril 15, 1969
Term endedApril 15, 1986
Patent numberCA 810357 A
Classification (IPC)A47C19/00

Timeline

Timeline From CIPO dates

196919711973197519771979198119831985Application filedFeb 28, 1968Patent grantedApril 15, 1969Term endedApril 15, 1986

Sources & verification

Official CIPO records

Canadian Patents DatabaseClaims, description, documents and status.CIPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.com

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.