Expired Canadian patentCanada
Composite lance
CA 2097006 C · Owner: Kobayashi, Hisashi · Inventors: Tuson, Geoffrey B.; Kobayashi, Hisashi; Francis, Arthur W. Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lance and gas injection system wherein the lance comprises a metallic supply tube and a two piece small diameter nozzle comprising a metallic backpiece and a ceramic frontpiece.
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 May 26, 1993 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 26, 1993
GrantedOctober 14, 1997
Term endedMay 26, 2013
Patent numberCA 2097006 C
Classification (IPC)F23D14/48 +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.