Apparatus and method for controlling molten glass flow through a forehearth
CA 2326577 A1 · Owner: Perry, Philip D. · Inventors: Perry, Philip D.; Dembicki, Michael T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for controlling rate of molten glass flow through a forehearih that izacludes a flume disposed in the forehearth for restricting the width of the forehearth to glass, flow such that there is a difference in level of molten glass in the forehearth upstream and, downstream of the flume. Sensors measure the level of molten glass upstream and downstream, of the flume, and a controller is responsive to the sensors for detezxninin.g rate of molten glass, flow. through the forehearth as a function of a difference in molten glass level between the, sensors. Rate of glass flow through the forehearth is controlled as a function of the difference, in glass level across the flume as …
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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
- Filed November 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.