Smoking tobacco for user-prepared cigarettes, and a method of production and packaging for same
CA 2133603 C · Owner: Efka-Werke Fritz Kiehn Gmbh · Inventors: Schutze, Gunter; Ruppert, Heinrich W.; Gatschmann, Klaus G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Smoking tobacco for user-prepared cigarettes in, particular those employing prefabricated cigarette-paper tubes, comprises at least one tobacco portion in the form of a slab which itself comprises at least two subportions each held together by an internal and/or external fixative. The outer surface of the tobacco portion and/or the subportions is air-pervious so that a directed airstream cannot be drawn through it whereby the respective tobacco portion and subportions are non-smokable as formed. Each subportion comprises a sufficient quantity of tobacco for one cigarette and forms a stick of tobacco with a substantially polygonal, in particular rectangular and preferably square cross …
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 October 4, 1994 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 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.