Metal oxide free fluoroelastomer compositions and fusing member containing same
CA 2136315 A1 · Owner: Ames Rubber Corporation · Inventors: Lentz, James A.; Delrosario, Chris F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluoroelastomer composition free of metal or metal containing compounds, such as metal, metal alloys metal salts or metal oxide, suitable for the upper layer of a fuser roll which does not require the use of mercapto functional active release agents to prevent offset is provided. The fluoroelastomer compositions contain at least 23.4 mole percent hexafluoropropylene. They can be cured by electron beam treatment, fugitive base treatment or by the use of blocked/hindered bases.
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 May 24, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 24, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2015.
- 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.