Sealing bead
CA 2399176 A1 · Owner: Sadr, Changize · Inventors: Sadr, Changize
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fuel system components (30) for vehicles may be made from polyethylene components which are typically blow molded. To inhibit fuel vapour permeation the polyethylene is often co-extruded into a parison (16) with the parison (16) comprising a barrier layer (50). Upon trimming flash or in the mold closure itself, the barrier layer (50) may be ruptured. Sealing of areas of discontinuity (40, 42) in the fuel system component (30) to inhibit hydrocarbon vapour pass through is achieved by sealing the area of barrier discontinuity (40, 42) with a sealing bead (70 90) which has the necessary , barrier properties. The barrier properties may be inherent in the sealing bead material (90) or in …
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 February 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2023.
- 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.