Inert plastic coated flexible type diaphragm for application in a sanitary type pump
CA 2184568 C · Owner: Westinghouse Air Brake Company · Inventors: Eady, Eldon S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inert plastic coated flexible diaphragm for sanitary pump applications includes a first body portion disposed in, center of diaphragm, which is relatively thick and exhibits a first degree of flexibility. A second body portion is formed contiguously with the first body portion and extends around periphery thereof. The second body portion is relatively thin, compared to the first body portion and exhibits a, second degree of flexibility greater than the first degree of flexibility. A sealing bead-like member is formed contiguously with such second body portion and extends around periphery thereof for sealing the flexible diaphragm in an operating position within a housing portion of such …
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 August 30, 1996 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2018.
- 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.