Patent US4493944A successfully refreshed from Google Patents.
US4493944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder glass and electrical device employing same
Assignee: Osram Sylvania Inc
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Filing: 1984-01-04
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Granted: 1985-01-15
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Expires: 2004-01-04
Abstract
Abstract A solder glass comprising, by weight, about 65% Sb 2 O 3 ; about 30% B 2 O 3 ; and about 5% PbO. The glass is molten at about 350° C. and can be employed as a molten seal in electrical devices such as tungsten-halogen lamps.
Inventors
- 👤 Richard G. Snell
- 👤 Fredrick A. Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/38; C; C03; C03C; C03C3/00; C03C3/12; C03C3/14; C03C3/142; C03C8/00; C03C8/24; H01J61/00; H01J61/02; H01J61/30; H01J61/302; H01J61/36; H01J61/366; H01J61/368; H01K; H01K1/00; H01K1/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A solder glass comprising, by weight; about 65% Sb 2 O 3 ; about 30% B 2 O 3 ; and about 5% pbO.
Claim 2
Dependent Claim
24 words
A solder glass comprising, by weight; about 65% Sb 2 O 3 ; about 30% B 2 O 3 ; and about 5% pbO.
Claim 3
Dependent Claim
99 words
A seal for electrical devices comprising a body of substantially fused silica and at least one electrically conductive member sealed therein, said member comprising a proximal portion projecting within said body, an intermediate thin foil portion hermetically sealed within said body, and a distal portion projecting exteriorly of said body, and a capillary passage surrounding said distal portion and extending to said intermediate portion, said capillary passage being substantially filled with a solder glass comprising: about 65 weight percent Sb 2 O 3 ; about 30 weight percent B 2 O 3 ; and about 5 weight percent PbO.
Claim 4
Dependent Claim
99 words
A seal for electrical devices comprising a body of substantially fused silica and at least one electrically conductive member sealed therein, said member comprising a proximal portion projecting within said body, an intermediate thin foil portion hermetically sealed within said body, and a distal portion projecting exteriorly of said body, and a capillary passage surrounding said distal portion and extending to said intermediate portion, said capillary passage being substantially filled with a solder glass comprising: about 65 weight percent Sb 2 O 3 ; about 30 weight percent B 2 O 3 ; and about 5 weight percent PbO.
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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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |