A short dwell coater apparatus
CA 2108037 C · Owner: Chance, James L. · Inventors: Chance, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A short dwell coater apparatus (10) is disclosed for applying coating material (12) onto a web (W) guided by a backing roll (14). The apparatus (10) includes a coater housing (16) which is disposed in close proximity to the backing roll (14). The arrangement is such that the web (W) guided by the backing roll (14) moves between the backing roll (14) and the housing (16). The housing (16) defines an application chamber (18) which is open towards the web (W) and which extends along the web (W) in a cross-machine direction. The application chamber (18) is connected to a source (20) of coating material (12) such that the coating material (12) is applied to the web (W) during movement of the web …
Read the whole patent
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 January 31, 1992 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2014.
- 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.