Ion-nitriding apparatus
CA 1110201 A · Owner: Kawasaki Jukogyo Kabushiki Kaisha · Inventors: Edamura, Mizuo; Kunise, Satoru; Tanaka, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure This invention relates to a retort type apparatus for ion-nitriding treatment having a plurality of vacuum reacting furnaces. Each furnace is so designed that by the combined use of a glow discharge and a heating element (installed between an outer wall and an inner shielding wall of each furnace) workpieces are heated and nitrided at high efficiency with stable discharge, uniform temperature distribution and in a short time. The plural furnaces use a common D.C. power source which is switched between the furnaces for alternately generating a glow discharge in each furnace. The heating elements can be individually energised or can also have a common A.C. power …
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
- Granted October 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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.