US3849142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barium- or strontium-containing glass frits for silver metallizing compositions
Assignee: EIDP Inc
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Filing: 1972-12-13
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Granted: 1974-11-19
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Expires: 1992-12-13
Abstract
Abstract Silver metallizing compositions comprising barium or strontiumcontaining frits for fusion to the surface of a ceramic body. Also included are patterns formed from the metallizing compositions and fused to the surface of ceramic bodies. CdO/BaO/B2O3/SiO2 or CdO/SrO/B2O3/SiO2 represent preferred compositions. Ternary compositions in which either B2O3 or SiO2 are deleted from the preferred quaternary systems also provide workable and adequate frits. These frits, combined with Bi2O3, give binders for metallizing compositions. Such metallizing compositions result from mixing these binders with noble-metal powders and a liquid vehicle. The metallizing compositions may then fuse to surfaces of ceramic bodies.
Inventors
- 👤 J Conwicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:23
CPC Classifications
C; C03; C03C; C03C12/00; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/51; C04B41/5183; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
IN A NOBLE-METAL COMPOSITION COMPRISING 35-85 PERCENT OF A NOBLE-METAL POWDER, 15-70 PERCENT OF A LIQUID VEHICLE; 2-10 PERCENT OF BI2O3; AND 2-6 PERCENT OF A GLASS FRIT BINDER: THE IMPROVEMENT COMPRISING, AS SAID BINDER, A GLASS FRIT CONSISTING ESSENTIALLY OF, 8-65 PERCENT BAO OR SRO OR A MIXTURE OF BAO AND SRO; 15-75 PERCENT CDO; AND 3-45 PERCENT OF B2O3 OR SIO2 OR A MIXTURE OF B2O3 AND SIO2, THE AMOUNT OF EITHER SAID B2O3 OR SAID SIO2 NOT EXCEEDING ABOUT 30 PERCENT.
Claim 2
Dependent Claim
84 words
IN A NOBLE-METAL COMPOSITION COMPRISING 35-85 PERCENT OF A NOBLE-METAL POWDER, 15-70 PERCENT OF A LIQUID VEHICLE; 2-10 PERCENT OF BI2O3; AND 2-6 PERCENT OF A GLASS FRIT BINDER: THE IMPROVEMENT COMPRISING, AS SAID BINDER, A GLASS FRIT CONSISTING ESSENTIALLY OF, 8-65 PERCENT BAO OR SRO OR A MIXTURE OF BAO AND SRO; 15-75 PERCENT CDO; AND 3-45 PERCENT OF B2O3 OR SIO2 OR A MIXTURE OF B2O3 AND SIO2, THE AMOUNT OF EITHER SAID B2O3 OR SAID SIO2 NOT EXCEEDING ABOUT 30 PERCENT.
Claim 3
Dependent Claim
63 words
The composition of claim 1 wherein a. said noble-metal powder is silver and is present in an amount of about 45-60 percent; b. said liquid vehicle is present in an amount of about 30-45 percent; c. said Bi2O3 is present in an amount of about 8-10 percent; and d. said frit is present in an amount of about 2-3 percent and includes about:
Claim 4
Dependent Claim
6 words
25-60 percent of said CdO; and
Claim 5
Dependent Claim
6 words
25-60 percent of said CdO; and
Claim 6
Dependent Claim
28 words
10-25 percent of said B2O3 and 10-25 percent of said SiO2, the total amount of said B2O3 and said SiO2 being in the range of about 15-40 percent.
Claim 7
Dependent Claim
28 words
10-25 percent of said B2O3 and 10-25 percent of said SiO2, the total amount of said B2O3 and said SiO2 being in the range of about 15-40 percent.
Claim 8
Dependent Claim
16 words
A ceramic body having firmly fused to its surface a noble-metal composition according to claim 1.
Claim 9
Dependent Claim
15 words
A ceramic body having firmly fused to its surface the composition according to claim 2.
Claim 10
Dependent Claim
21 words
A ceramic body of claim 4 wherein said body is composed of a preponderant amount of barium titanate or titanium dioxide.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |