US3615831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead oxide-sulfuric acid battery having a positive electrode comprising a titaniummolybdenum-zirconium alloy grid
Assignee: Individual
•
Filing: 1970-07-01
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Granted: 1971-10-26
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Expires: 1990-07-01
Abstract
Abstract The invention is a lead-acid rechargeable cell in which the positive electrode comprises a base of a titanium-molybdenumzirconium alloy having a surface film of a nonpolarizing element, such as gold, and an active lead oxide coating over said nonpolarizing surface.
Inventors
- 👤 Samuel Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:03
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; H01M10/00; H01M10/06; H01M10/34; H01M10/342; H01M4/14; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
14 words
The storage battery of claim 1 characterized in that the nonpolarizing coating is gold.
Claim 2
Dependent Claim
32 words
The storage battery of claim 1 characterized in that the positive electrode grid consists preponderantly of titanium with smaller amounts of molybdenum and zIrconium and that the negative electrode comprises lead-coated copper.
Claim 3
Dependent Claim
22 words
The storage battery of claim 1 characterized in that the sulfuric acid electrolyte contains a minor amount of basic titanium titanyl sulfate.
Claim 4
Dependent Claim
82 words
A storage battery comprising an electrode having a grid of an alloy, said alloy consisting essentially of a minimum of 75 percent titanium by weight of the total composition of said alloy, and molybdenum and zirconium in an aggregate amount of not more than 25 percent by weight of said alloy, a nonpolarizing film on said electrode, a lead oxide coating on said film, said electrode constituting the positive electrode of the battery, an electrolyte of sulfuric acid and a negative electrode.
Claim 5
Dependent Claim
22 words
The storage battery of claim 5 above, characterized in that the nonpolarizing film comprises one of the elements gold, lead and carbon.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |