Glow discharge atomic emission spectroscopy and apparatus thereof
CA 2038518 C · Owner: Kawasaki Steel Corporation · Inventors: Mega, Tetsuya; Furunushi, Yasuko; Yokoi, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved glow discharge atomic emission spectroscopy and the apparatus are offered in which the introduction of a rare gas into a glow discharge tube is temporarily cut off and after the inside of the glow discharge tube is maintained at a higher degree of vacuum a preliminary, discharge is executed to remove adsorbed or extraneous substances on the specimen surface, and then the analysis of the specimen surface is performed. The method and the apparatus described in the above are suitable for a quick and simple analysis of the uppermost surface layer of a solid specimen in the direction of depth.
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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 March 18, 1991 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 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.