Accumulator charging system
CA 2178331 A1 · Owner: Briggs, Roger Robarts · Inventors: Leppanen, Jarmo Uolevi; Briggs, Roger Robarts
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An accumulator (10) which includes a diaphragm (26) a first gas-charged chamber section (32) with the diaphragm (26) on a wall thereof, and which is characterised by a second gas-charged chamber (16) which is in communication with the first chamber section (32) through at least one passage (20).
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 13, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.