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Expired Canadian patentCanada

Protective sheath for electrical or optical conductors hardenedwith respect to x-rays

CA 1298699 C · Owner: Sainte Luce Banchelin, Jean · Inventors: Bourcereau, Jean; Sainte Luce Banchelin, Jean; Valy, Yves

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

Protective sheath for optical or electrical conductors hardened with respect to X-rays. It comprises a flexible sheath formed from a resin matrix containing in regularly dispersed powder form at least one metal and/or at least one inorganic compound of a metal, said metal having a high atomic number of at least 47 a covering placed between the optical fibre and the X-ray protection sheath and optionally a mechanical protection sheath made from plastic directly covering the optical fibre.

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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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 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 13, 1987
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298699 C
Classification (IPC)H01B11/06 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 13, 1987Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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