A method and a device for application of powder on a strip
CA 2205013 C · Owner: Nordson Corporation · Inventors: Simonsson, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method and a device for application of talcum powder or a powder of super-absorbent type (SAP) or the like the latter containing , polyacrylate and/or a salt such as a sodium salt, on a strip. In accordance with the invention the strip is made to travel through a treatment chamber (3) in which debouch a number of powder supply lines (12) distributed circumferentially with respect to said strip. The powder supply lines are incorporated in a friction charger formed with polarizing ducts through which the powder material is made to pass.
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 November 9, 1995 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2017.
- 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.