Patent US3798070A successfully refreshed from Google Patents.
US3798070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-acid storage battery with titanyl sulfate buffered electrolyte
Assignee: Individual
•
Filing: 1972-05-12
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Granted: 1974-03-19
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Expires: 1992-05-12
Abstract
Abstract A titanium grid is used to support the positive electrode of lead peroxide while the negative porous lead electrode is supported on either a copper or titanium grid in a lead-lead-acid storage battery. A small quantity of titanyl sulfate is added to the aqueous sulfuric acid electrolyte to inhibit dissolubility of the titanium therein. In one battery embodiment the electrolyte is immobilized by gelling and confined between the electrodes while the assembly is surrounded with an insulating wrapping and sealed hermetically in a quantity of cured epoxy resin.
Inventors
- 👤 S Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:44
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M10/00; H01M10/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
19 words
An electric storage battery according to claim 1, wherein said titanyl sulfate is the compound having the formula TiOSO4.H2SO4.8H2O.
Claim 2
Dependent Claim
18 words
An electric storage battery according to claim 1, wherein said electrolyte is in the form of a gel.
Claim 3
Dependent Claim
21 words
An electric storage battery according to claim 1, wherein said electrolyte is gelled by the admixture of submicron particles of silica.
Claim 4
Dependent Claim
51 words
An electric storage battery according to claim 1, wherein said electrolyte is the product resulting from admixing titanyl sulfate with aqueous sulfuric acid solution in the proportion of 1 to 10 grams of titanyl sulfate to each 300 ml of acid solution, and heating the admixture to below its boiling point.
Claim 5
Dependent Claim
21 words
An electric storage battery according to claim 5, wherein said admixture is heated to a temperature no greater than 105* C.
Claim 6
Dependent Claim
70 words
An hermetically sealed lead/sulfuric acid/lead peroxide cell having a positive electrode comprising a titanium base and a coating of lead peroxide, a non-polarizing conductive film interposed between the titanium and the lead peroxide, an immobilized gelled electrolyte comprising aqueous sulfuric acid having a specific gravity within the range of 1.200 to 1.300, and a gelling agent, said electrolyte further having a titanium ion content, and a negative electrode of lead.
Claim 7
Dependent Claim
17 words
The cell described in claim 7, characterized in that the electrolyte has a saturated titanium ion content.
Claim 8
Dependent Claim
14 words
The cell described in claim 7, characterized in that the electrolyte contains titanyl sulfate.
Claim 9
Dependent Claim
20 words
The cell described in claim 7, characterized in that the lead peroxide coating contains a minor amount of lead phosphate.
Claim 10
Dependent Claim
20 words
The cell described in claim 7, characterized in that the lead peroxide coating contains a minor amount of barium sulfate.
Claim 11
Dependent Claim
25 words
The cell described in claim 7, characterized in that the non-polarizing conductive film is composed of at least one of the metals gold and lead.
Claim 12
Dependent Claim
73 words
In a lead/sulfuric acid/lead peroxide cell, the combination with a titanium base having a coating of lead oxide and a non-polarizing film therebetween, of an immobilized gelled electrolyte comprising aqueous sulfuric acid having a specific gravity within the range of 1.200 to 1.300, and a gelling agent, said electrolyte further having a saturated titanium ion content, said electrolyte being held in a confined area and in direct contact with said lead oxide coating.
Claim 13
Dependent Claim
84 words
An hermetically sealed lead/sulfuric acid/lead peroxide cell having a positive electrode comprising a titanium grid having a coating of lead oxide, an immobilized gelled electrolyte comprising aqueous sulfuric acid having a specific gravity within the range of 1.200 to 1.300, and a gelling agent, said electrolyte further having a saturated titanium ion content, a negative electrode of lead, a spacer having a frame structure located between the electrodes, the open areas of said frame holding and confining said electrolyte in contact with said electrodes.
Claim 14
Dependent Claim
16 words
The cell described in claim 14, characterized in that the gelling agent is finely divided silica.
Claim 15
Dependent Claim
25 words
The cell described in claim 14, characterized in that means are provided to hold said confined electrolyte in continuous pressure contact with said positive electrode.
Claim 16
Dependent Claim
23 words
The cell described in claim 14, characterized in that a thin electrolyte permeable spacer is interposed between said frame and said positive electrode.
Claim 17
Dependent Claim
23 words
The cell described in claim 14, characterized in that an absorbent protective sheet is positioned against the outer side of the negative electrode.
Claim 18
Dependent Claim
17 words
An electric storage battery according to claim 1, wherein said electrolyte has a saturated titanium ion content.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |