Closed chamber method and apparatus for the coating of liquid films
CA 2270807 A1 · Owner: Robillard, Francois P. · Inventors: Caron, Germain L.; Robillard, Francois P.; Beaumont, Guy D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The described invention provides a method and apparatus for coating uniform films on, substrates and curing the coatings on the surface. Within an enclosed chamber the object, to be coated is positioned and a sufficient amount of liquid material is provided into the, chamber to cover the surface of the object to be coated. The excess liquid material is then, evacuated from the chamber at a controlled rate to leave a coating of material on the, surface of the object.
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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 May 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 2021.
- 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.