Large diameter polytetrafluoroethylene or like seals
CA 2544566 C · Owner: Skf Usa Inc. · Inventors: Boyers, Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A large-diameter PTFE seal (60). The lip (76) of the seal is made from a long strip of PTFE bound together at the ends with the aid of a patchng tape to form a closed loop. The loop is then flanged and placed between an inner and an outer case (62, 64), together with a rubber-like gasket (78) and the cases , are crimped together, entrapping the lip material between them.
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 November 22, 2004 and granted May 29, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.