High efficiency mixer impeller
CA 2048596 C · Owner: Chemineer, Inc. · Inventors: Fasano, Julian B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high efficiency impeller has blades (20) which are formed of plate material. Each blade has a first span-wise bend (30) which extends generally parallel to the trailing edge (34) and through about the center of the blade meaasured cord-wise and extending the length of the blade from the root end to the tip end, and divides the blade into a back portion (42) and a front portion (40). The front portion (40) is further divided by a second bend line which extends from the intersection (45) of the first bend line (44) with the tip of the blade diagonally to the leading edge of the blade at a position (36) about one-fifth to one-third the span-wise length outwardly from the blade root.
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 January 24, 1991 and granted September 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2013.
- 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.