Exhaust pipe gasket
CA 2387266 A1 · Owner: Dana Corporation · Inventors: Jamrog, James I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spiral-wound gasket includes a plurality of tightly wound metal windings to form a core. The windings each have a Chervon cross-section wherein V-notched, undulations of each winding registers with an adjacent winding at said notches. The, edges of the windings are welded to form a pre-assembled integral composite that is, installed into a J-shaped outer wrap or cover. Finally the cover is closed , about the, core so as to entirely cover and encapsulate the core. In a preferred form both the, core and outer cover are formed of stainless steel materials.
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 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2024.
- 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.