Cooking vessel bottom and production method thereof
CA 2091301 A1 · Owner: Tvs S.P.A. · Inventors: Gambini, Rino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flat cooking-vessel bottom whose outer surface is provided with equidistant concentric grooves in the form of circles and coated with two overlying layers of which the first is in contact with the metal and consists of a material with high radiation heat absorption capacity distributed uniformly over the entire bottom surface and the second layer consists of an enamel or silk-screen process paste resistant to abrasion and scratching distributed nonuniformly and preferably in segments and only on the lands between the surface grooves.
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 March 9, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 2015.
- 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.