Patent US3734702A successfully refreshed from Google Patents.
US3734702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass sealing method
Assignee: OI Glass Inc
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Filing: 1971-05-03
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Granted: 1973-05-22
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Expires: 1991-05-03
Abstract
Abstract A crystallizable fusion-type glass sealing composition, such as lead borosilicate or lead-zinc-borate solder glass, having incorporated therein from about 1 to about 18 percent by weight of aluminum titanate; which composition is used as a sealing glass. The aluminum titanate inhibits crystallization, thus allowing for more time for sealing parts without developing a seal with uneven stress concentration due to crystallization.
Inventors
- 👤 F Veres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:54
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/06; C03C27/10; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/074; C03C3/0745; C03C3/12; C03C3/14; C03C3/142; C03C3/145; C03C3/23
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The invention of claim 1 wherein the sealing composition contains about 3 to about 15 weight percent aluminum titanate.
Claim 2
Dependent Claim
19 words
The invention of claim 1 wherein the sealing composition contains about 5 to about 12 weight percent aluminum titanate.
Claim 3
Dependent Claim
120 words
In a process for sealing a glass surface to another surface by a fusion-type solder glass selected from the group consisting of lead borosilicate glass and lead-zinc-borosilicate glass maintained at an elevated temperature in the liquid state, the improvement comprising incorporating in said solder glass about 1 to about 18 percent by weight, based on the total weight of the solder glass, of aluminum titanate to increase by at least 11.9 percent the time required for said solder glass to reach its isothermal peak as compared to the time required for said solder glass in the absence of aluminum titanate, whereby the time available, during which said solder glass is in the liquid state, to seal said surfaces is increased.
Claim 4
Dependent Claim
56 words
The invention of claim 4 wherein said solder glass consists essentially of about 70 to about 82 weight percent PbO, about 1 to about 20 weight percent ZnO, and about 5 to about 20 weight percent B2O3 in addition to said aluminum titanate, said weight percents being based on the total weight of said solder glass.
Claim 5
Dependent Claim
19 words
The invention of claim 4 wherein said solder glass contains about 3 to about 15 weight percent aluminum titanate.
Claim 6
Dependent Claim
19 words
The invention of claim 4 wherein said solder glass contains about 5 to about 12 weight percent aluminum titanate.
Claim 7
Dependent Claim
72 words
A process for increasing by at least 11.9 percent the time required for solder glass in the liquid state to reach its isothermal peak as compared to the time required for said solder glass in the absence of aluminum titanate, comprising incorporating about 1 to about 18 percent by weight of aluminum titanate in said solder glass, said solder glass selected from the group consisting of lead borosilicate glass and lead-zinc-borosilicate glass.
Claim 8
Dependent Claim
43 words
The invention of claim 8 wherein said solder glass consists essentially of about 70 to about 82 weight percent PbO, about 1 to about 20 WEIGHT percent ZnO, and about 5 to about 20 weight percent B2O3 in addition to said aluminum titanate.
References Cited (Backward Citations)
US3559190A
Cited
US3499167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |