|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||215/216 ; 215/334|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 16 인용 특허 : 8|
A closure is provided having concentric inner and outer spaced cylindrical shells attached at respective first distal ends thereof by a circular top wall. An arcuate groove is provided in an upper surface of the top wall integral with the inner cylindrical shell.
[ I claim:] [1.] A closure, comprising:a top wall having an outer diameter;an outer shell depending downwardly from a lower surface of said top wall;an inner shell depending downwardly from said lower surface and disposed concentrically with and spaced inwardly from said outer shell; and,an arcuate groove disposed in an upper surface of said top wall depending downwardly towards said inner shell.