Expired Canadian patentCanada
Preparation of silicon metal through polymer degradation
CA 1162385 A · Owner: Dow Corning Corporation · Inventors: Gaul, John H. Jr.; Weyenberg, Donald R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, What is disclosed is a method of forming silicon metal from the pyrolytic degradation of polychlorosilanes.
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 February 21, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 10, 1981
GrantedFebruary 21, 1984
Term endedFebruary 21, 2001
Patent numberCA 1162385 A
Classification (IPC)C01B33/02 +2 more
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.