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Expired Canadian patentCanada

Continuous inorganic fiber consisting of si, n and o and method of producing the same

CA 1239005 A · Owner: Nippon Carbon Co. Ltd. · Inventors: Hasegawa, Yoshio; Sato, Mitsuhiko; Okamura, Kiyohito

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Abstract From the Canadian patent

A continuous inorganic fiber consisting of Si, N and O has excellent physical, chemical and electrically insulating properties, is superior to carbon fiber in wettability with metal is low in, reactivity with metal, and can be used not only as a reinforcing fiber for fiber-reinforcing type metals and fiber-reinforcing type ceramics, but also in electrical insulating materials and in heat-resistant materials.

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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, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2005.
  • 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 26, 1985
GrantedJuly 12, 1988
Term endedJuly 12, 2005
Patent numberCA 1239005 A
Classification (IPC)D01F9/10 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedApril 26, 1985Patent grantedJuly 12, 1988Term endedJuly 12, 2005

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