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Expired Canadian patentCanada

Alkali alloy fiber, shaped article comprising the same and method of preparing the same

CA 1091411 A · Owner: Avtex Fibers Inc. · Inventors: Smith, Frederick R.

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

Method for making alloy fibers having high fluidholding capacity, the alloy fibers being comprised of a matrix of regenerated cellulose having alkali metal salts of alginic acid uniformly dispersed therein as, the sole additive for increasing the fluid holing capacity of 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 December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 1997.
  • 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 31, 1977
GrantedDecember 16, 1980
Term endedDecember 16, 1997
Patent numberCA 1091411 A
Classification (IPC)D01F2/06 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedOct 31, 1977Patent grantedDec 16, 1980Term endedDec 16, 1997

Sources & verification

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