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Expired Canadian patentCanada

Solar heat selective absorbing material and its manufacturing method

CA 1330641 C · Owner: Fujimoto, Masanori · Inventors: Kagechi, Shunsaku; Fujimoto, Masanori

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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 object of this invention is to provide a solar heat selective absorbing material of high performance which is prepared by using a diversity substrate by simple manufacturing methods. The construction of the solar heat selective absorbing material is such that a carbide of a transition metal belonging to the IV group of periodic table or a mixed powder of the carbide and the aluminum is applied directly or by means of a binder on the surface of the substrate to form a film. This solar heat selective absorbing material is manufactured by a method of forming a film of material for example, ZrC on the surface of the substrate by high frequency sputtering or a method of mixing a mixed powder …

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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 July 12, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 15, 1987
GrantedJuly 12, 1994
Term endedJuly 12, 2011
Patent numberCA 1330641 C
Classification (IPC)F24J2/48 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 15, 1987Patent grantedJuly 12, 1994Term endedJuly 12, 2011

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