Multiple stage centrifugal compressor
CA 2134703 C · Owner: Lamson Corporation · Inventors: Brasz, Joost J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiple stage centrifugal compressor has baffle rings attached at the inlet to each of the impellers between a shroud side curvature and a hub side curvature. The dimensions and spacings of the baffle rings are selected as a function of the shroud side radius of curvature R S and the hub side radius of curvature R H. For two baffle rings, the radii are, R C1 = (R C2 x R H)1/3 and R C2 = (R S x R H2)1/3.
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 October 31, 1994 and granted September 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 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.