Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1981-08-31
1984-03-27
McCarthy, Helen M.
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
350409, 350432, 501 44, 501 48, 501903, C03C 316
Patent
active
044395299
ABSTRACT:
Glasses consisting of 45-55 mol. % P.sub.2 O.sub.5, 15-40 mol. % BaO, 5-15 mol. % Li.sub.2 O, 5-35 mol. % PbO, 0-2 mol. % Al.sub.2 O.sub.3 and 0-6 mol. % F are suitable for the precision pressing of lenses.
REFERENCES:
patent: 3281253 (1966-10-01), Weidel
patent: 3281254 (1966-10-01), Weidel
patent: 3485646 (1969-12-01), Junge
patent: 4285730 (1981-08-01), Sanford et al.
patent: 4348484 (1982-09-01), Joormann et al.
Haisma Jan
Joormann Hendrik J. M.
Verweij Hendrik
McCarthy Helen M.
Miller Paul R.
U.S. Philips Corporation
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