Sub-cylinder for liquified petroleum gas
CA 2102268 A1 · Owner: Toh, Kim San · Inventors: Toh, Kim San
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquified petroleum cylinder has a reserve cylinder within it provided with a separate outlet external to the main cylinder. The reserve cylinder may be provided with a nonreturn valve (not shown in Figure 1), whereby both cylinders may be filled with gas through the same external valve.
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 November 2, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 2015.
- 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.