Animal watering device
CA 2044925 A1 · Owner: Lischka, Kenneth A. · Inventors: Lischka, Kenneth A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
ANIMAL WATERING DEVICE", ABSTRACT OF THE DISCLOSURE A watering device for animals includes a cylindrical container with an open top and a surrounding lip around the open top. A closure member for the open top includes a disc which is flat with a surrounding skirt extending along the sides of the container. The skirt has holes to allow the escape of air trapped under the closure member. The closure member carries a downwardly extending guide member on the under surface which carries a float and which is guided for movement in a vertical direction. The float is located under the water surface so that depression of the closure member and the float do not significantly alter the water depth. …
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 18, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.