Filter for lowering harmful crankcase emissions in an internal combustion engine
CA 2106471 C · Owner: Ventures Unlimited, Inc. · Inventors: Sweeten, Theodore P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus is provided herein for receiving crankcase emissions from an internal combustion engine and for separating the liquid portions of the emissions from, the gaseous portion thereof. The apparatus includes a housing an inlet which , is, connected to a crankcase vent for taking-in crankcase emissions and an outlet , which is, connected to a combustion chamber of the internal combustion engine. Filtering material, is positioned within the housing between the inlet and the outlet the , filtering material, being coating with a viscous liquid. Manually-adjustable metering means are provided, for selectively-controlling the discharge of the emissions from the housing to the, …
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 2, 1991 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2013.
- 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.