Apparatus for supplying molten bituminous material
CA 1112517 A · Owner: Marathon Equipment Ltd. · Inventors: Mason, Robert W.; Fung, Ignatius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for supplying molten bituminous material to an elevated level in which the molten bituminous material is pumped by a pump through a valve and up an upstanding supply pipe to the elevated level the supply pipe is in communication through two ports of the valve with the interior of the vat for free draining under gravity of the body of bituminous material from the supply pipe back to the vat when the supply of molten bituminous material to the elevated level is discontinued. While the supply of molten bituminous material to the elevated level is discontinued the bituminous material is pumped through two further ports of the valve for recycling back into the vat, preferably at an …
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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 November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
- 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.