Process and apparatus for graphitizing carbon bodies
CA 2041399 A1 · Owner: Panholzer, Heinrich · Inventors: Panholzer, Heinrich; Holuigue, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbon bodies to be graphitized are clamped together in a horizontal train, in which adjacent end faces of said bodies adjoin each other and are heated, by a flow of electric current in a graphitizing zone and subsequently cooled in a cooling zone. Individual carbon bodies are added to the train at the entrance of the graphitizing furnace and individual carbon bodies which have been graphitized are removed from the train at the exit of the furnace. To ensure a desirable handling of the train in the furnace the, train being moved through the graphitizing furnace is moved at least in a portion of the cooling zone through a bed of carbonaceous bulk material and outside said bed of bulk …
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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 April 29, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2013.
- 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.