Automatic swimming pool cleaner
CA 2175208 C · Owner: Sta-Rite Industries, Inc. · Inventors: Rief, Dieter J.; Frentzel, Herman E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic swimming pool cleaner (20) having a vibrator (30) on the pool cleaner housing (22), main bristles (34) projecting to main-bristle ends (34b) for supporting the device on a surface to be cleaned, the main bristles inclined such that vibration causes forward movement and, secondary bristles (38, 40 and/or 42) in fixed position projecting to secondary-bristle ends (38b 40b and/or 42b), the secondary bristles inclined in a different direction from the main bristles such that, upon contact with the surface to be cleaned vibration causes a turning away from the forward direction.
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 October 24, 1994 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2016.
- 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.