Disposable culture dish with reinforcement ribs
CA 2013670 E · Owner: Iskander, Ezzat · Inventors: Iskander, Ezzat
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Petri dish in which the flat bottom is provided with a plurality of preferablyradial ribs is disclosed. The ribs do not project more that about 0.05 inches above the upper surface of the bottom, and preferably not more than about 0.03 inches. The thickness of the bottom portion other than at the ribs is not greater than about 0.03 inches and preferably not, greater than about 0.025 inches. Various rib arrangements are contemplated. In the preferred embodiment, there are at least three radial ribs and preferably four ribs spaced at 90 degrees to each other. A lid having the same basic structure may also be produced. Generally any suitable rib layout could be selected. A large number of …
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 April 2, 1990 and granted December 1, 1992. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2012.
- 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.