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Expired Canadian patentCanada

Elastomeric composition

CA 1295065 C · Owner: Thiruvengada, Seshan · Inventors: Allen, Ralph Daniel; Cesare, Frank Charles; Visser, Harry Dale

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

Blends comprised of (A) a high molecular weight elastomeric polymer; (B) a sufficient amount of an ethylene/alphaolefin/nonconjugated polyene terpolymer having a number average molecular weight of between about 1,000 and about 15,000 such that the variety of the blend is at least about 5% lower than the viscosity of component (A) alone, and (c) a curative exhibit, increased processability, and when cured, exhibit, unexpectedly desirable tensile strength ozone resistance, and oil resistance.

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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 January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
  • 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 15, 1987
GrantedJanuary 28, 1992
Term endedJanuary 28, 2009
Patent numberCA 1295065 C
Classification (IPC)C08L21/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 15, 1987Patent grantedJan 28, 1992Term endedJan 28, 2009

Sources & verification

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