Aquarium wall cleaning apparatus
CA 2280361 A1 · Owner: Rofen, Robert R. · Inventors: Rofen, Robert R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for cleaning the inner wall surfaces of an aquarium tank includes a pair of magnetic assemblies adapted for mutual magnetic engagement. Both assemblies include an outer housing of waterproof material and a planar, surface adapted to impinge on the aquarium walls. A scrubber pad is laminated to, at least one planar surface of the assemblies and a strong permanent magnet , is, secured within the protective enclosure of each housing. One assembly impinges its scrubber surface on the inner surface of an aquarium wall and the other, assembly is disposed directly adjacent to the inner assembly and in magnetic engagement therewith. Translating movement of the outer assembly causes …
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 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2021.
- 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.