Grommet cup packing made of elastomeric material for hydraulic apparatus
CA 2238515 C · Owner: Knapp, Francesco · Inventors: Knapp, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seal packing made of elastomeric material (9) for a hydraulic apparatus adapted to be inserted in a seat (3) that is recessed into one of two parts (1, 4) between which a seal is to be established and to be pushed elastically into contact with the other part. The packing has a composite structure which is comprised of an elastomeric material (9) in the portions intended to establish the seal and of a rigid or semirigid core (11 12) material that is , at least partly incorporated into the elastomeric material of the packing.
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 September 11, 1997 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2019.
- 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.