Process for preparing spherical copper fine powder
CA 1330398 C · Owner: Kawasaki Steel Corporation · Inventors: Otsuka, Kenichi; Nitta, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for preparing a spherical copper fine powder having an average grain size ranging from 0.1 µm to a few µm, by use of chemical vapor deposition of cuprous chloride vapor with a reducing gas the vapor, deposition zone is maintained at a temperature ranging 900°C to less than 1150°C and the generated particles are quenched subsequently. The generated powder is utilized as a conductive powder which is the main component of a conductive paste.
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 June 28, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 2011.
- 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.