Expired Canadian patentCanada
Dynamic seal with flushing protection of static seal
CA 2021888 C · Owner: Itt Corporation · Inventors: Izya Korenblit
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flushing protection arrangement is provided between the static seal and the auxiliary impeller so that when the, pump is not operating the static seal will be protected by a flushing fluid.
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 July 24, 1990 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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.
FiledJuly 24, 1990
GrantedAugust 18, 1998
Term endedJuly 24, 2010
Patent numberCA 2021888 C
Classification (IPC)F04D29/08 +2 more
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.