Cleaning internal combustion engines
CA 2179997 A1 · Owner: Hollub, Peter · Inventors: Hollub, Peter; Lentini, Joseph; Waelput, Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cleaning internal combustion engines, (16) includes drawing cleaning fluid from a resevoir (22) by a pump (74), flushing through the block of the internal combustion engine (16), and returning the fluid to the resevoir (22) by the pump (74). Prior to cleaning, flushing and soaking the engine (16), lubricant is withdrawn under a pressure differential from the engine block. A vacuum can be applied to the oil drain (20) for the engine block for effecting this withdrawal. Additionally or alternatively, pressure can be applied to the oil filter opening (18) to the engine block for facilitating the withdrawal of the lubricant.
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, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2016.
- 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.