Apparatus for preheating and charging scrap materials
CA 2135635 C · Owner: Yamamura, Ikuo · Inventors: Mori, Motoharu; Ogushi, Masaki; Yoshida, Hironobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for preheating and charging scrap material comprises a throat section (38) having at one end thereof a material charging inlet (37) connected to a furnace shell (2) the throat section, extending laterally and upwardly obliquely a heat exchanger section, (39) connected to the other end of the throat section (38) and extending upwardly, a sealing section (42) above the heat exchanger section (39) material supply means (43) for supplying the scrap material into the sealing section (42), an exhaust duct (53) formed at the heat exchanger section (39) just below the sealing section (42) and connected to an exhaust system (58) and a material delivery device (46) disposed at the other …
Read the whole patent
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 April 14, 1994 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2016.
- 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.