Method and apparatus for producing fiber skeins
CA 2126159 C · Owner: Rhone-Poulenc Rhodia Aktiengesellschaft · Inventors: Greiner, Christoph; Teufel, Eberhard; Leutner, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing at least one fiber skein in, particular for producing at least one filter skein for the production of filters for cigarettes and for other smokable rod-shaped articles, wherein at least one fiber strip in, particular a filter tow strip is drawn off of supply. The at least one drawn-off fiber strip is supplied to subsequent treatment, in which the fiber strip is inter alia, stretched and fluffed, the at least one treated fiber strip is then collected in a formating unit to a fiber skein or to filter skeins, which lastly are provided with an enveloping material, to form one or more continuous wrapped fiber, skeins, in particular filter skeins the fiber strip or, strips …
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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 June 17, 1994 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2016.
- 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.