Hardened glass or glass-ceramic cooking vessel formed as a wok, and method of making same
CA 2299213 A1 · Owner: Rodek, Erich · Inventors: Hubert, Stefan; Gotz, Helga; Weiss, Evelin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The hardened borosilicate glass or glass-ceramic cooking vessel in the form of a wok has a cooking surface that is easier to clean than prior art metal woks. Furthermore when it heated a better temperature distribution for cooking is produced and it can be universally heated either by a radiantly heated body or an, atmospheric gas burner. The method of making the wok starts with a glass blank or piece of borosilicate glass, which is then heated until it softens and shaped or, formed into the shape of the wok optionally ceramicized and cooled to form the, wok.
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 February 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2022.
- 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.