Expired Canadian patentCanada
Aramid fluff
CA 2032790 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Bair, Thomas Irvin
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition is disclosed which comprises a fluff of aramid fibers wherein some of the aramid fibers are in the form of balls of the fluff. The composition is particularly useful for insulation, absorption cushioning, and the like.
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 December 20, 1990 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1990
GrantedOctober 3, 2000
Term endedDecember 20, 2010
Patent numberCA 2032790 C
Classification (IPC)D04H1/42
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.