Device for protecting optical means from contaminated gases
CA 1291887 C · Owner: N.V. Optische Industrie "De Oude Delft" · Inventors: Vingerling, Abraham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title. Device for protecting optical means from contaminated gases. ABSTRACT, A device for protecting optical means from contaminated gases, characterized by a chamber having an inlet for the supply of clean gas, said chamber including at least one opening through which light radiation can pass and a gas outlet, and that there is provided a cover having a window adapted to be placed over said opening which, cover is provided with a slot-like inlet in its inner surface and a slit-like outlet communicating with said inlet and extending along the outer surface of said cover so that gas supplied from the gas supply inlet in the chamber passes through said chamber and said gas outlet of said …
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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
- Granted November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2008.
- 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.