|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||220/592.17 ; 220/592.28 ; 220/062.12 ; 215/013.1 ; 215/012.1|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 60 인용 특허 : 2|
A double layer mug includes an outer layer, an inner layer, an annular ring, and a grip. The outer layer is transparent, having an engage member on an outer surface. The inner layer can endure high temperature, having an inner annular projection. Between the outer and the inner layer is formed a hollow layer for storing a cool agent therein. The annular ring has an annular aperture for an elastic ring to fit therein, and an inner inner wall and an outer wall defining the aperture contact with an upper mouth of the inner and the outer layer, with an annul...
[ I claim:] [1.] A double layer mug comprising:an outer layer made of a transparent material, having an engage member formed on an outer surface near an upper mouth;an inner layer made of a heat-enduring material, positioned in said outer layer, and having an annular projection in an inner surface near an upper mouth, a hollow layer formed between said inner layer and said outer layer;an annular ring made of a heat-enduring material, having an annular aperture defined by an annular outer wall and an annular inner wall and facing down, an annular groove f...