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Expired Canadian patentCanada

Fiber reinforced carbon and graphite articles and a method of producing said articles

CA 1098265 A · Owner: Carborundum Company (The) · Inventors: Demunda, Gabriel P.

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Abstract From the Canadian patent

BC1-25 Canada, FIBER REINFORCED CARBON AND GRAPHITE ARTICLES AND A METHOD OF PRODUCING SAID ARTICLES, ABSTRACT The present invention relates to fiber reinforced carbon and graphite articles that are characterized by a matrix of fibrous carbon material bonded together by a deposited pyrolytic material and having the residue of a carbonized filler material dispersed within the article in contact with the pyrolytic material. Fiber reinforced carbon and graphite articles are produced by (1) Forming reinforcing fibers into a shape without any binder material, (2) infiltrating he fibers with a pyrolytic material in a manner to deposit pyrolytic material on the fibers and bond together the fibers, …

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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 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.
FiledAugust 9, 1978
GrantedMarch 31, 1981
Term endedMarch 31, 1998
Patent numberCA 1098265 A
Classification (IPC)B32B9/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedAug 9, 1978Patent grantedMarch 31, 1981Term endedMarch 31, 1998

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