Method and apparatus for making high purity amorphous silica fibers
CA 1045959 A · Owner: Johns-Manville Corporation · Inventors: Kielmeyer, William H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A method and apparatus are disclosed for producing amorphous silica fibers having excellent resistance to devitrification at temperatures up to 2500°F by leaching glass fibers. The method involves controlling the non-silica ingredients in the starting glass fibers and periodically gently stirring the glass fibers during leaching. The apparatus comprises a perforated basket resting in the upper half of a leaching tank. An acid solution is added to the tank through a rotating spray arm until the solution just barely covers a fibrous mass of loose sodium silicate fibers which are disposed in the perforated basket. A mechanical stirrer or agitator is provided …
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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 January 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 1996.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.