US3684536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismuthate glass-ceramic precursor compositions
Assignee: EIDP Inc
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Filing: 1970-11-04
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Granted: 1972-08-15
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Expires: 1990-11-04
Abstract
Abstract BISMUTHATE GLASS-CERAMIC PRECURSORS WHICH ARE GLASS FRIT COMPOSITIONS AND WHICH ARE USEFUL IN FORMING PRINTED CIRCUIT METALLIZATIONS EXHIBITING EXCELLENT ADHESION OF METALLIZATION TO CERAMIC SUBSTRATE. METALLIZING COMPOSITIONS FOR SCREEN PRINTING CIRCUITS ONTO CERAMIC SUBSTRATES WHICH CONSIST ESSENTIALLY OF, BY WEIGHT, (A) 3-15% OF A FINELY DIVIDED POWDER OF SUCH GLASS-CERAMIC PRECURSORS AS A BINDER AND (B) 85-97% OF A FINELY DIVIDED NOBLE METAL POWDER. DIELECTRIC CERAMIC SUBSTRATES HAVING PRINTED AND FIRED THEREON SUCH METALLIZING COMPOSITIONS.
Inventors
- 👤 Lewis Charles Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; C; C03; C03C; C03C10/00; C03C10/0054; C03C4/00; C03C8/00; C03C8/02; C03C8/10
Claims Analysis
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |