Pressure generator and dispensing apparatus utilizing same
CA 2134663 C · Owner: Pg North America, Inc. · Inventors: Cruysberghs, Rudiger Josef Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for dispensing product from a container (16) in which first and second members (36 40) are provided in a, vessel (32) which is disposed in the container (16). The first member (36) defines with the vessel a first chamber (38) and the, second member (40) defines with the first member (36) a second chamber (46). When the first member moves to a second position in response to the pressure in the container decreasing below the predetermined pressure the first chamber is connected with the container to permit the pressurized gas in the first chamber to pass to the container. When the first member moves to a first position this connection is disconnected to prevent the passage of the …
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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 April 30, 1992 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2014.
- 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.