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Expired Canadian patentCanada

Making gasket having roller coated secondary seals

CA 1284566 C · Owner: Mcdowell, Donald J. · Inventors: Mcdowell, Donald J.; Zabel, Jerry

CIPO record

Overview

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

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Abstract From the Canadian patent

A method of making a gasket is disclosed. Peaks such as those formed by embossments are formed in a main gasket body, the peaks projecting from a major surface of the gasket body. The projecting peaks are roller coated with a sealant material which is then cured, thereby inexpensively to form an improved gasket.

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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.

Why it's free to use

  • Granted June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 19, 1988
GrantedJune 4, 1991
Term endedJune 4, 2008
Patent numberCA 1284566 C
Classification (IPC)B29D99/00 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedApril 19, 1988Patent grantedJune 4, 1991Term endedJune 4, 2008

Sources & verification

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