Compositions: ceramic – Ceramic compositions – Clay containing
Reexamination Certificate
1997-08-22
2001-07-17
Jones, Deborah (Department: 1775)
Compositions: ceramic
Ceramic compositions
Clay containing
C501S103000, C501S105000, C501S127000
Reexamination Certificate
active
06261985
ABSTRACT:
INTRODUCTION
This invention relates to cookware, in particular to non-stick ceramic cookware.
In the present society, modern technology has made life ever changing. Cooking is no longer just to fill the stomach as in the 1950's. A modern family stresses the quality of life. Every thing must be done fast and in good taste. Especially, the daily three meals should save time and energy, so that cooking can be done quickly without losing the original taste and nourishment and without adding artificial flavor. Healthy food is the desire of every household. To this end, industries throughout the developed countries in the world are utilizing high technologies to develop advanced and practical cookware to satisfy the need.
The present ceramic cooker in the market has some shortcomings. The cooker is not coated with non-stick material. After cooking, the cooker must be scrubbed for cleaning and presents a nuisance.
Traditional non-stick cooker is coated with non-stick material over metallic material. Because the metallic material transmit heat unevenly, the temperature at the heated point is very high, but the temperature at the non-heated point is low.
SUMMARY
An object of the present invention is to provide a high temperature cookware. Another object of this present invention is to provide a high speed cookware without losing the original taste. Still another object of the present invention is to develop a cookware which serves to fry, to bake, to stir fly and to boil. A further object of the present invention is to utilize far infra-red radiation to cook without burning and sticking to the utensil.
These objects are achieved in this invention by utilizing high temperature ceramic to provide far-infrared radiation. The material contains cordierite, mullite and petalite. Such a ceramic possesses heat preservation and conduction properties. The cookware can heat up quickly without burning, and provide uniform temperature. By adding another layer of polytetrafluoroethylene (PTFE), also known as Teflon, the cookware become non-sticking. The material can store heat to reradiate as far-infrared rays and overcome the problem of non-uniform heat conduction. This invention combines the merits of uniform heating of traditional pottery pot and the non-sticking property of modern frying pan.
REFERENCES:
patent: 3871890 (1975-03-01), Eppler et al.
patent: 4123401 (1978-10-01), Berhhmans et al.
patent: 4851287 (1989-07-01), Hartsing, Jr.
Jones Deborah
Lin H. C.
McNeil Jennifer
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