Patent US3922471A successfully refreshed from Google Patents.
US3922471A
Expired / Lapsed
US
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Surface having sealing glass composition thereon
Assignee: OI Glass Inc
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Filing: 1974-04-01
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Granted: 1975-11-25
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Expires: 1994-04-01
Abstract
Abstract Novel compositions of matter consisting of thermally crystallizable lead borosilicate and lead-zinc-borate sealing glasses having homogeneously blended therein a calcined zirconia vanadia silica stain.
Inventors
- 👤 James L Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:32
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C8/245; C03C10/00; C03C10/0054
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A COMPOSITE ARTICLE COMPRISING AT LEAST ONE PREFORMED SURFACE OF A MATERIAL SELECTED FROM AT LEAST ONE OF THE GROUP IF GLASS, CERAMIC, METAL AND METALLIC ALLOY AND HAVING A FUSIONTYPE SEALING COMPOSITION THEREI ON CONSISTING ESSENTIALLY OF A BASE SEALING GLASS HAVING A SEALNG TEMPERATURE BELOW THE DEFORMATION TEMPERATURE OF SAID PREFORMED SURFACE AND BEING SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF LEAD-ZINCBORATE AND LEAD-BOROSILICATE SEALING GLASSES, SAID BASE SEALING GLASS HAVING FROM ABOUT 2 TO ABOUT 18 PERCENT BY WEIGHT OF A CALCINED ZIRCONIA VANADIA SILICA STAIN HOMOGENEOUSLY BLENDED THEREIN, SAID FUSION-TYPE SEALING COMPOSITION POSSESSING THE PROPERTY OF BEING DEVITRIFIABLE TO PRODUCE A DEVITRIFIED FUSIONTYPE SEAL HAVING A THERMAL COEFFICIENT OF EXPANSION RANGING FROM ABOUT 5 X 10-7 IN. IN. *C, (C. (0*-300*C) TO 20 X 10-7 IN. IN. *C. (0*-300*C.) LOWER THAN THE SAME SEALING GLASS COMPOSITION WOULD POSSESS UPON BEING DEVITRIFIED WITHOUT ANY ZIRCONIA VANADIA SILICA STAIN BEING BLENDED THEREIN.
Claim 2
Dependent Claim
154 words
A COMPOSITE ARTICLE COMPRISING AT LEAST ONE PREFORMED SURFACE OF A MATERIAL SELECTED FROM AT LEAST ONE OF THE GROUP IF GLASS, CERAMIC, METAL AND METALLIC ALLOY AND HAVING A FUSIONTYPE SEALING COMPOSITION THEREI ON CONSISTING ESSENTIALLY OF A BASE SEALING GLASS HAVING A SEALNG TEMPERATURE BELOW THE DEFORMATION TEMPERATURE OF SAID PREFORMED SURFACE AND BEING SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF LEAD-ZINCBORATE AND LEAD-BOROSILICATE SEALING GLASSES, SAID BASE SEALING GLASS HAVING FROM ABOUT 2 TO ABOUT 18 PERCENT BY WEIGHT OF A CALCINED ZIRCONIA VANADIA SILICA STAIN HOMOGENEOUSLY BLENDED THEREIN, SAID FUSION-TYPE SEALING COMPOSITION POSSESSING THE PROPERTY OF BEING DEVITRIFIABLE TO PRODUCE A DEVITRIFIED FUSIONTYPE SEAL HAVING A THERMAL COEFFICIENT OF EXPANSION RANGING FROM ABOUT 5 X 10-7 IN. IN. *C, (C. (0*-300*C) TO 20 X 10-7 IN. IN. *C. (0*-300*C.) LOWER THAN THE SAME SEALING GLASS COMPOSITION WOULD POSSESS UPON BEING DEVITRIFIED WITHOUT ANY ZIRCONIA VANADIA SILICA STAIN BEING BLENDED THEREIN.
Claim 3
Dependent Claim
41 words
A composite article according to claim 1 wherein said base sealing glass consists essentially of 70 to 85 weight percent PbO, 6 to 15 weight percent ZnO and 7 to 10 weight percent B2O3 and 0 to 5 weight percent SiO2.
Claim 4
Dependent Claim
40 words
A composite article according to claim 1 wherein said base sealing glass consists essentially of 70 to 85 weight percent PbO, 7 to 15 weight percent B2O3, 2 to 10 weight percent SiO2 and 1 to 5 weight percent Al2O3.
Claim 5
Dependent Claim
33 words
A composite article according to claim 1 wherein said calcined zirconia vanadia silica stain possesses the property of lowering the crystallization temperature of said base sealing glass by about from 10*C. to 15*C.
Claim 6
Dependent Claim
28 words
A composite article according to claim 1 wherein said base sealing glass has homogeneously blended therein about 8 percent by weight of said calcined zirconia vanadia silica stain.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |