Oil-filter assembly
CA 2293055 A1 · Owner: Szabo, Arpad · Inventors: Szabo, Arpad; Wittenzellner, Georg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil-filter assembly has an upwardly open can generally centered on an upright axis and having at an upper rim a mounting ring having in turn an axially upwardly directed annular seal surface and, offset axially downward therefrom an annular, upwardly directed annular shoulder surface. A filter insert of filter material in the can has an annular outwardly directed flange sitting on the shoulder surface and an upper end wall. A cover fittable over the ring has a lower surface engageable with the seal surface of the ring and with the end wall of the filter insert. Fasteners press the cover down on the ring and filter insert and retaining the cover in place on the ring.
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 December 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2021.
- 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.