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US3656984A
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Glass-ceramic precursors
Assignee: EIDP Inc
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Filing: 1970-12-18
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Granted: 1972-04-18
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Expires: 1990-12-18
Abstract
Abstract Novel glass-ceramics are prepared from glasses which consist essentially of critical proportionate amounts of SiO2, PbO, Al2O3, TiO2 and BaO; optional components thereof include ZnO, PbF2, SrO, ZrO2, Ta2O5, WO3, CdO, SnO2 and Sb2O3. The glasses are used, e.g., in particulate form, in preparing screen-printable crossover dielectric compositions, and as the inorganic binder component in preparing screen-printable conductor or resistor compositions, each of which may be fired to produce these novel glass-ceramics.
Inventors
- 👤 Lewis Charles Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:51
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/129; C; C03; C03C; C03C10/00; C03C10/0054; C03C4/00; H01B; H01B1/00; H01B1/14; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06573; H01C17/0658; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K3/00; H05K3/46; H05K3/4685; C03C2204/00; C03C2204/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A glass according to claim 1 which is of a composition consisting essential of (by weight): 22-32% SiO2 22-42% PbO 9-13% Al2O3 3-15% TiO2 4-12% BaO 0-20% ZnO 0-10% PbF2 0-4% SrO 0-4% ZrO2 0-4% Ta2O5 0-4% WO3 0-4% CdO 0-4% SnO2 0-4% Sb2O3
Claim 2
Dependent Claim
27 words
A glass according to claim 1 which is of a composition consisting of (by weight): 30% SiO2 32% PbO 11% Al2O3 9% TiO2 8% BaO 10% ZnO
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |