Two stroke internal combustion engine
CA 2116975 C · Owner: Powell, Brian Leslie · Inventors: Powell, Brian Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two stroke internal combustion engine comprises a piston (8) reciprocating in, compression chamber (6), an inlet valve (5) permitting the supply of scavenging air at, high pressure to compression chamber (6) a small external combustion , chamber(3) having restricted communication (9) with compression chamber (6) a valve (2), permitting the injection into combustion chamber (3) of a rich fuel/air mixture which in, part passes to compression chamber (6) to form a fuel lean mixture with the scavenging, air therein, and ignition means (1) to ignite the fuel rich mixture in combustion, chamber(3), in turn allowing burning fuel to ignite the fuel lean mixture in compression, chamber (6) …
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 September 23, 1992 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.