US4308323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery seal
Assignee: Emerson Electric Co
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Filing: 1980-11-10
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Granted: 1981-12-29
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Expires: 2000-11-10
Abstract
Abstract A graded glass battery seal is provided wherein at least two glasses are employed, one bonded to a terminal pin, the other to the battery wall, the glasses having sufficiently different electrical/chemical properties to produce a greater resistance to chemical attack than is exhibited by either glass alone.
Inventors
- 👤 Benjamin Bowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:08
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C27/00; C03C27/02; C03C3/078; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C8/00; C03C8/02; C03C8/06; C03C8/24; H; H01; H01M; H01M50/00; H01M50/10; H01M50/183; H01M50/186; H01M50/188; H01M50/19; H01M50/191; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
In a battery containing at least one chemical corrosive to glass, said battery having a terminal pin extending from within said battery, through a wall, and projecting outside said wall, and a glass seal between said pin and said wall, said seal being of the graded type wherein at least two glasses are employed, one bonded to the pin, and another to the wall and bonded, mediately or immediately, to one another, the improvement comprising said two glasses' being of sufficiently different electrical/chemical properties to produce a greater resistance to attack from said chemical than is exhibited by either of said glasses alone.
Claim 2
Dependent Claim
103 words
In a battery containing at least one chemical corrosive to glass, said battery having a terminal pin extending from within said battery, through a wall, and projecting outside said wall, and a glass seal between said pin and said wall, said seal being of the graded type wherein at least two glasses are employed, one bonded to the pin, and another to the wall and bonded, mediately or immediately, to one another, the improvement comprising said two glasses' being of sufficiently different electrical/chemical properties to produce a greater resistance to attack from said chemical than is exhibited by either of said glasses alone.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein the battery is a lithium-sulfur dioxide system battery.
Claim 4
Dependent Claim
25 words
The improvement of claim 1 or 2 wherein one of the glasses contains at least ten percent boron oxide and the other contains substantially none.
Claim 5
Dependent Claim
107 words
The improvement of claim 1, 2 or 3 wherein one of the glasses has approximately the following composition, by weight percent: silica 64, potassium oxide 10, sodium oxide 5, barium oxide 20, and lithium oxide 1, and the other glass is taken from the group consisting of a glass with approximately the following composition by weight percent: silica 64, boron oxide 12.3, potassium oxide 5.8, sodium oxide 6.0, aluminum oxide 3.5, barium oxide 7.4, lithium oxide 0.1 and calcium fluoride 0.8, and a glass with approximately the following composition by weight percent: silica 68.4, boron oxide 22.1, potassium oxide 4.0, sodium oxide 3.5 and aluminum oxide 2.0.
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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |