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Expired Canadian patentCanada

Durable primer composition

CA 1205942 A · Owner: Toray Silicone Company, Ltd. · Inventors: Mikami, Ryuzo; Nakasuji, Katsuyoshi

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

Abstract, A primer composition which has excellent durability when immersed in water is made from a silicone-modified epoxy resin, an aminoxy silicon compound and an, organotitanate. The primer composition is particularly useful for bonding room temperature vulcanizable silicone rubber or room temperature vulcanizable silicone-modified organic rubber to building substrate materials.

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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 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
  • 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 17, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205942 A
Classification (IPC)C08K3/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 17, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

Sources & verification

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