A method and apparatus of obtaining natural gas from a maritime deposit
CA 2013605 C · Owner: Sulzer Brothers Limited · Inventors: Mandrin, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The natural gas which is obtained from a maritime deposit is purified on a rig or ship and is then compressed and cooled while on the rig or ship before being delivered under pressure to a LNG tanker where liquefaction takes place by the Joule-Thomson effect. An expansion group is disposed on the tanker in order to obtain liquefied natural gas at approximately 1 bar while non-liquefied residual gases are returned to the rig or ship via a return line.
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 April 2, 1990 and granted November 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2012.
- 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.