Moulded fibrous materials
CA 1083458 A · Owner: Wiggins Teape Limited · Inventors: Green, Kieron P.; Tringham, Roger W.; Allen, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fibrous element comprising an elongated structure having a fibrous core with the fibres arranged in random orientation. The core is stiffened and enclosed by a fibrous crust integral with the core and formed as a surface layer of greater density. The element is of particular value in manufacturing cigarette tips where it has the advantage over the prior art of not requiring an initial paper wrap and has good filtration and hardness.
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 August 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 1997.
- 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.