Die coater for applying discrete coating patches
CA 2120330 A1 · Owner: Milbourn, Thomas M. · Inventors: Milbourn, Thomas M.; Barth, Jerry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) for coating a pattern of spaced discrete patches (12) on a web (14) of material includes an extrusion die (18) and a metering pump (20) which supplies coating fluid to the extrusion die (18) from a fluid reservoir (24). A valve (26) directs fluid to either the extrusion die (18) or the fluid reservoir (24) and a piston provides a pulsed flow of fluid to the extrusion die (18). A controller, including a digital preset counter controls the length of the coated portions of the web (14) the distance, between the coated portions of the web (14) and the timing of, the valve (26) with respect to the operation of the piston (28).
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 September 22, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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.