Cigarette filter and process for manufacturing the same
CA 2424810 A1 · Owner: Hauni Maschinenbau Ag · Inventors: Horn, Sonke; Wolff, Stephan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Filter and process for producing filter for articles of the tobacco processing industry. The filter includes at least one filter component of multiplecomponent, fibers. The multiple-component fibers have lengths shorter than a length of the, filter. The process includes producing a rod including at least one type of multiple-component fibers having lengths shorter than a length of the filter to be, produced. Further, the multiple-component fibers have a casing. The process further includes heating the rod to a temperature above a melting temperature of, the casing, and cooling the rod to a temperature below the melting temperature of, the casing. The instant abstract is neither intended …
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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 April 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2025.
- 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.