US3926680A
Expired / Lapsed
US
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Primary magnesium element
Assignee: VARTA Batterie AG
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Filing: 1974-01-21
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Granted: 1975-12-16
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Expires: 1994-01-21
Abstract
Abstract An electrolyte for a primary battery which is buffered with respect to its chromate ions by containing concurrently Ba -, Sr -, So4 -, and 4 ions, which ions are in equilibrium with the corresponding solid phase substances BaCrO4, BasO4, and SrSrO4.
Inventors
- 👤 Jakob Bauer
- 👤 Winfried Krey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:06
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
40 words
IN A PRIMARY GALVANIC ELEMENT COMPRISING CONVENTIONAL COMPONENTS INCLUDING A CHROMATE INHIBITOR THE ELECTOLYTE WHICH COMPRISES CONCURRENTLY, AS A CHROMATE BUFFER SYSTEM, BARIUM, STRONTIUM, CHROMATE AND SULPHATE IONS IN EQUILBRIUM WITH SOLID PHASE BARIUM CHROMATE, BARIUM SULPHATE AND STRONTIUM SULPHATE.
Claim 2
Dependent Claim
40 words
IN A PRIMARY GALVANIC ELEMENT COMPRISING CONVENTIONAL COMPONENTS INCLUDING A CHROMATE INHIBITOR THE ELECTOLYTE WHICH COMPRISES CONCURRENTLY, AS A CHROMATE BUFFER SYSTEM, BARIUM, STRONTIUM, CHROMATE AND SULPHATE IONS IN EQUILBRIUM WITH SOLID PHASE BARIUM CHROMATE, BARIUM SULPHATE AND STRONTIUM SULPHATE.
Claim 3
Dependent Claim
21 words
A primary galvanic element according to claim 1 wherein the mass of the positive electrode contains the ingredients BaCrO4 and SrSO4.
Claim 4
Dependent Claim
21 words
A primary galvanic element according to claim 1 wherein the mass of the positive electrode contains the ingredients BaSO4 and SrCrO4.
Claim 5
Dependent Claim
25 words
The element of claim 1 wherein the total amount of chromate and sulfate is each at least 2 X 10 3 mole per kilogram electrolyte.
Claim 6
Dependent Claim
46 words
In a primary galvanic element comprising conventional components including a chromate inhibitor the electrolyte which comprises the following salts: barium chromate, barium sulfate and strontium sulfate so that the electrolyte contains the four following ions: strontium, barium, chromate and sulfate in equilibrium with the undissolved salts.
Claim 7
Dependent Claim
46 words
In a primary galvanic element comprising conventional components including a chromate inhibitor the electrolyte which comprises the following salts: barium chromate, barium sulfate and strontium sulfate so that the electrolyte contains the four following ions: strontium, barium, chromate and sulfate in equilibrium with the undissolved salts.
Claim 8
Dependent Claim
38 words
In a primary galvanic element comprising conventional components including a chromate inhibitor the electrolyte which comprises the four ions strontium, barium, chromate and sulfate and the salts from which these ions are derived in equilibrium with said ions.
Claim 9
Dependent Claim
38 words
In a primary galvanic element comprising conventional components including a chromate inhibitor the electrolyte which comprises the four ions strontium, barium, chromate and sulfate and the salts from which these ions are derived in equilibrium with said ions.
Claim 10
Dependent Claim
12 words
In the element of claim 1, an anode electrode of magnesium alloy.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |