Coating apparatus for webs of material
CA 2002844 C · Owner: Mladota, John · Inventors: Mladota, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for applying a thin layer of a coating material (2) to a web of material (4) passing over a counter-pressure roller (3), with a slot nozzle device (1) comprises a, vertical nozzle box (5) with an upper nozzle slot (7) between inlet (8) and outlet (9) nozzle lips and a laterally mounted storage tank (6) for coating material (2). In order to keep the layer thickness the same and without coating flaws and thickened edges according to the operating speed and fluctuations in thickness of the web of material (4) the, storage tank (6) is mounted on the nozzle box (5) in such a way that the liquid level of the coating material (2) in the storage tank (6) and in the nozzle box (5) is …
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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 November 14, 1989 and granted October 10, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2011.
- 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.