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Expired Canadian patentCanada

Injection moldable composition

CA 1113629 A · Owner: Exxon Research And Engineering Company · Inventors: Kresge, Edward N.; Spenadel, Lawrence; Duvdevani, Ilan

CIPO record

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

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Abstract From the Canadian patent

An injection-moldable peroxide crosslinkable elastomeric, composition comprises a mixture of a crystalline interpolymer comprising ethylene and propylene; a low density polyethylene; one or more multifunctional vinylic or allylic monomers; a medium to high structure form of carbon; and an organic peroxide. The composition is particularly useful for the fabrication of injection molded structures which are required to flex on impact and return to their original shape when the distorting force is released. Typical structures are automotive fender extensions grilles and front, and rear fascia.

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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 December 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 1998.
  • 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 11, 1978
GrantedDecember 1, 1981
Term endedDecember 1, 1998
Patent numberCA 1113629 A
Classification (IPC)C08L23/16 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 11, 1978Patent grantedDec 1, 1981Term endedDec 1, 1998

Sources & verification

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