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Expired Canadian patentCanada

Selectively light-transmitting laminated structure

CA 1198301 A · Owner: Teijin Limited · Inventors: Mitani, Yuji; Mikoshiba, Hitoshi; Suzuki, Kazutomi

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Abstract From the Canadian patent

This invention relates to a selectively lighttransmitting laminated structure having various superior properties, which permits transmission of visible light and reflection of heat waves or infrared rays. Specifically it, relates to an improved selectively light-transmitting laminated structure which has improved resistance to light heat, gases, etc. particularly showing remarkably improved resistance to heat degradation demonstrated by a degradation time of usually at least about 1,000 hours, and frequently more than about 5,000 hours, as a result of providing a layer deposited as a material selected from the group consisting of Ti Zr, In, Si, C, Co and Ni, on the surface of a heat …

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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 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 9, 1981
GrantedDecember 24, 1985
Term endedDecember 24, 2002
Patent numberCA 1198301 A
Classification (IPC)G02B5/00

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedMarch 9, 1981Patent grantedDec 24, 1985Term endedDec 24, 2002

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