Method of controlling the solvent vapor concentration in a gas lock of an apparatus
CA 2058091 A1 · Owner: Boppart, Stephan Walter · Inventors: Boppart, Stephan Walter; Kumin, Marius Adelbert Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The solvent vapor concentration in a gas lock of an apparatus containing a treating chamber 1 and the gas lock 2 which solvent vapor is mixed with air and is obtained in the treatment of articles in the treating chamber is controlled by a method comprising the following steps:, a) passing the gaseous solvent vapor/air mixture from the gas lock 2 at least once through an adsorber 3 containing an adsorbent for the organic solvent and recycling the outlet gas stream from the adsorber to the gas lock;, b) after completion of the adsorption removing, treated articles from the gas lock 2 and/or loading the gas lock with articles to be treated; and c) heating the adsorbent and passing a gas stream …
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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 December 19, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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
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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.