US3885975A
Expired / Lapsed
US
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Low melting vanadate glasses
Assignee: Corning Glass Works
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Filing: 1974-05-09
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Granted: 1975-05-27
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Expires: 1994-05-09
Abstract
Abstract Glasses are disclosed that melt at low temperatures in the range of 500*-900*C. and that are composed essentially, by weight, of 25-85 percent vanadium oxide, 5-60 percent lead and/or cesium oxide, and 5-45 percent arsenic oxide. The glasses may be adapted either for encapsulating and sealing electrical elements, or for the fabrication of semiconducting elements.
Inventors
- 👤 Joseph W Malmendier
- 👤 Joseph E Sojka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/122
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A LOW MELTING VANADATE GLASS HAVING A COMPOSITION, IN WEIGHT PERCENT AS CALCULATED ON THE OXIDE BASIS IN TERMS OF CS2O, PBO, AS2O3, AND V2O5, CONSISTING ESSENTIALLY OF 5-60 PERCENT CS2+PBO, WHEREIN BOTH CS2O AND PBO ARE PRESENT IN AMOUNTS GREATER THAN INCIDENTAL IMPURITY LEVELS, 5-45% AS2O3, AND 25-85% V2O5, SAID GLASS BEING ESSENTIALLY FREE FROM SIO2, P2O5, AL2O3, LI2O, NA2O, AND K2O.
Claim 2
Dependent Claim
63 words
A LOW MELTING VANADATE GLASS HAVING A COMPOSITION, IN WEIGHT PERCENT AS CALCULATED ON THE OXIDE BASIS IN TERMS OF CS2O, PBO, AS2O3, AND V2O5, CONSISTING ESSENTIALLY OF 5-60 PERCENT CS2+PBO, WHEREIN BOTH CS2O AND PBO ARE PRESENT IN AMOUNTS GREATER THAN INCIDENTAL IMPURITY LEVELS, 5-45% AS2O3, AND 25-85% V2O5, SAID GLASS BEING ESSENTIALLY FREE FROM SIO2, P2O5, AL2O3, LI2O, NA2O, AND K2O.
Claim 3
Dependent Claim
44 words
A low melting vanadate glass according to claim 1 wherein said composition also contains up to 15% by weight total of the following metals, expressed in terms of the stated oxide, B2O3, Sb2O3, Tl2O3, TeO2, SeO2, Ag2O, TiO2, Fe2O3, Bi2O3, HgO, BaO, and SnO2.
Claim 4
Dependent Claim
47 words
A low melting vanadate glass having a composition, in weight percent as calculated on the oxide basis in terms of PbO, As2O3, and V2O5, consisting essentially of 5-60% PbO, 5-45% As2O3, and 25-85% V2O5, said glass being essentially free from SiO2, P2O5, Al2O3, Li2O, Na2O, and K2O.
Claim 5
Dependent Claim
47 words
A low melting vanadate glass having a composition, in weight percent as calculated on the oxide basis in terms of PbO, As2O3, and V2O5, consisting essentially of 5-60% PbO, 5-45% As2O3, and 25-85% V2O5, said glass being essentially free from SiO2, P2O5, Al2O3, Li2O, Na2O, and K2O.
Claim 6
Dependent Claim
45 words
A low melting vanadate glass according to claim 1 wherein said composition also contains up to 15 percent by weight total of the following metals, expressed in terms of the stated oxide, B2O3, Sb2O3, Tl2O3, TeO2, SeO2, Ag2O, TiO2, Fe2O3, Bi2O3, HgO, BaO, and SnO2.
Claim 7
Dependent Claim
22 words
A low melting vanadate glass according to claim 3 wherein said composition consists essentially of 25-60% PbO, 5-30% As2O3, and 35-60% V2O5.
Claim 8
Dependent Claim
44 words
A low melting vanadate glass according to claim 5 wherein said composition also contains up to 15 percent by weight total of the following metals, expressed in terms of the stated oxide, B2O3, Sb2O3, Tl2O3, TeO2, SeO2, Ag2O, TiO2, Fe2O3, Bi2O3, HgO, BaO, SnO2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |