|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||501/69 ; 501/70 ; 501/71 ; 501/86|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 0|
A glass composition substantially comprising silicon oxide, calcium oxide and aluminum oxide, and its use for producing gems.
A gem comprised of a glass composition having the following composition in % by weight based on oxide: ________________________________ - SiO2 42-64 CaO 21-57 Al2O3 1-15, ________________________________ wherein at least one or more of the following components at least partially replaces the CaO of said composition: ________________________________ - BeO 0-4% by weight MgO 0-20% by weight SrO 0-8% by weight BaO 0-5% by weight Li2O 0-8% by weight Na2O 0-8% by weight K2O 0-8% by weight Rb2O 0-8% by weight Cs2O 0-8% by weight. ______________________________...