Filter unit for filter-cigarettes and filter cigarettes
CA 2482157 A1 · Owner: Rozim, Peter · Inventors: Rozim, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The filter unit according the invention contains wood cuttings of a particle size of 0.2-1.2 mm impregnated with sodium chloride solution preferably with , a solution of 20-40% sodium chloride and 80-60% of water. The wood cutting may be in a loose form or the wood cutting particles (9) may be arranged on a rib (8) made of cellulose-acetate. The filter cigarette containing a filter unit according to invention may contain the filter unit (5) between the filter-tip (4) and the tobacco body (1) or between two parts of the filter-tip (4). Preferably, the filter unit (5) is separated from the filter-tip (4) and/or from the tobacco body (1) by a web (6). (Fig. 1)
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 May 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2024.
- 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.