Tire tube
CA 2220044 C · Owner: Mackelvie, Winston R. · Inventors: Mackelvie, Winston R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel container called a tire tube is made from whole used tires. They are , first, turned inside out or inverted. Several tire tubes may be connected together side, by side with holes aligned using fasteners such as self-tapping screws. With the, ends sealed the tire tube may be used as a container for toxic substance storage, or, filled with sand to act as a highway bumper. With the ends left open the tire, tube may be used as a conduit, or a culvert. The open-ended tire tube may be supported on wheels to allow rotation at a slight angle to the horizontal. With, the higher end being fed material the rotating tire tube tumbles the material to, the exit end. With rock added, the …
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 January 5, 1998 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2020.
- 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.