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Expired Canadian patentCanada

Manufacture of plastic bags

CA 934199 A · Owner: Bizon, Emil · Inventors: Murray, Charles R.; Bizon, Emil; Rowley, Edward K.

CIPO record

Overview

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

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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 September 25, 1973. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1990.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1971
GrantedSeptember 25, 1973
Term endedSeptember 25, 1990
Patent numberCA 934199 A
Classification (IPC)—

Timeline

Timeline From CIPO dates

1972197419761978198019821984198619881990Application filedDec 20, 1971Patent grantedSep 25, 1973Term endedSep 25, 1990

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.