Method of making glass
CA 1069307 A · Owner: Owens-Corning Fiberglas Corporation · Inventors: Froberg, Magnus L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method for producing a fiberizable borosilicate glass in which the constituents of the glass composition are classified into two or more melting groups. A molten base glass portion which is free of at least a major portion of the boric oxide yielding ingredients is prepared and, the remainder of the glass composition including the boric oxide yielding ingredients is introduced and homogenized with the molten base glass external to the base glass melting area there-, by to form a molten glass composition of desired characteristics. The invention is particularly adaptable to the formation of borosilicate glass fibers; the ingredients for the glass fiber are separated …
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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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.