Filter for fuels or lubricants of an internal combustion engine
CA 2085674 C · Owner: Poldner, Erich · Inventors: Poldner, Erich; Oelpke, Reinhard; Habiger, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter for fuel and/or lubricants of an internal combustion engine is described. This filter consists of a base plate which can be fastened to a threaded nipple a cover which is releasably fastened to the base plate and a support tube disposed on the cover or base plate. A filter cartridge is slipped over the support tube and consists of a cylinder-shaped filter insert and nonmetallic end plates. This filter cartridge is in contact with a sealing means on the base plate and an additional sealing means on the cover. Replacement of the entire filter is not necessary, with only the filter cartridge requiring replacement at specified intervals of time.
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 17, 1992 and granted October 10, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2014.
- 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.