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Expired Canadian patentCanada

Refractory fiber products and method of making such products

CA 1296873 C · Owner: Esposito, Arthur N. · Inventors: Esposito, Arthur N.; Wolter, Peter A.

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

The method of molding a ceramic product by forming a mixture of ceramic fibers with lengths less than one-fourth inch, water and a deflouculent, the mixture having a consistency which will not flow, placing the mixture in a water-absorbing mold, vibrating the mold to cause the mixture to flow into contact with the mold and eliminate voids in the mixture, allowing a portion of the water of the mixture to be absorbed by the mold leaving a hardened remnant in the mold removing the hardened remnant from the mold and heating the, hardened remnant to sinter the fibers therein to each other. In one example granular alumina is mixed with the mass of fibers, water and the deflouculent to form the …

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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 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 5, 1987
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1296873 C
Classification (IPC)B28B1/52 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 5, 1987Patent grantedMarch 10, 1992Term endedMarch 10, 2009

Sources & verification

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