Treatment of fibrillated fibres
CA 1055355 A · Owner: British-American Tobacco Company Limited · Inventors: Luke, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the treatment of fibre particular-, ly for making rods of bonded fibrillated polyolefin fibre which, can be used for example as or in tobacco smoke filters. The fibre may be crimped or straight and are bonded with a polymeric or copolymeric bonding agent which is applied to the fibres without the application of heat, the bonding agent being in the form of a cold setting emulsion, applied for example by means of a shear cone rotating at high speed or by brush means the treated, fibres then being formed to shape and allowed to cure in normal conditions and in the absence of heating.
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
- Granted May 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
- 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.