Fibrillated ptfe surface
CA 2178945 A1 · Owner: Mccollam, Francis Michael John · Inventors: Mccollam, Francis Michael John; Allan, Andrew Miller
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A porous polytetrafluorethylene (PTFE) structure suitable for use as an oil transfer component for coating or wiping a roll in a fuser system of a copying machine, has a fibrillated surface produced by casting PTFE suspension onto a mesh and drying such that the PTFE engulfs at least some of the wires of the mesh. Removal of the PTFE sheet from the mesh results in a fibrillated irregular surface (72. 74). The PTFE structure is formed from particles of granular-type polytetrafluoroethylene fused together to form a porous integral network of interconnected particles.
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 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 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.