Temperature-regulated liquid animal feeder
CA 2045896 C · Owner: Ewing, Frederick Douglas · Inventors: Ewing, Frederick Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An animal feeder is provided for delivering temperatureregulated liquid feed to one or more animal feed sites. A refrigerated or heated reservoir stores the liquid feed and one, two or three conduits lead from the reservoir to a feed dish which has a bowl portion and a heat exchange portion. A conduit supplies the bowl through a float valve which maintains the liquid in the bowl at a predetermined level. Conduits also circulate liquid through the heat exchange chamber which serves to cool or heat the solid and/or liquid feed in the bowl.
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 June 28, 1991 and granted October 12, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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.