US3647544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate having dual porosity
Assignee: Huntington Alloys Corp
•
Filing: 1969-11-24
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Granted: 1972-03-07
•
Expires: 1989-11-24
Abstract
Abstract Directed to the production of battery plates having dual porosity and having a plurality of expanded metal grids electrically connected in parallel with the grids having a porous galvanically active material such as cadmium adhering thereto, the larger pores formed by pockets in the expanded metal communicating with finer pores in the porous metal surrounding the pockets and with a greater proportion of the galvanically active material being placed in the interior of the plate, and to bipolar plates so produced.
Inventors
- 👤 Friedrich August Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:43
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/04; H01M4/0438; H01M4/044; H01M4/0442; H01M4/045; H01M4/0452; H01M4/24; H01M4/244; H01M4/64; H01M4/66; H01M4/661; H01M4/662; H01M4/665; H01M4/667; H01M4/70; H01M4/72; H01M4/74; H01M4/745; H01M2004/026; H01M2004/029; H01M4/36; H01M4/38; H01M4/42; H01M4/48; H01M4/52; H01M6/00; H01M6/42; H01M6/46; H01M6/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
A battery plate according to claim 1 wherein the grids have a zinc surface and the porous material is zinc.
Claim 2
Dependent Claim
27 words
A battery plate according to claim 1 wherein the grids have a nickel surface and the porous material is nickel having a surface of active nickel oxide.
Claim 3
Dependent Claim
52 words
A battery plate according to claim 1 wherein the grids have a cadmium surface and the porous material is selected from the group consisting of cadmium, cadmium alloys with up to 20 percent nickel, and cadmium alloys with small amounts of an element from the group consisting of thallium, selenium and silver.
Claim 4
Dependent Claim
22 words
A battery plate according to claim 1 wherein the mean ratio of said large pores to said fine pores is about 40.
Claim 5
Dependent Claim
37 words
A battery plate according to claim 4 wherein said large pores have diameters of about 0.2 to about 0.4 millimEter and wherein the average pore size of said fine pores is about 2 to about 20 microns.
Claim 6
Dependent Claim
49 words
A battery plate according to claim 4 wherein a protective covering of copper sheet having a plurality of slots and plated with cadmium to give a bellmouth configuration to said slots with said plated sheet being placed upon each side of said plate such that said bellmouth face outwards.
Claim 7
Dependent Claim
13 words
A battery plate according to claim 4 wherein the grids are electroformed copper.
References Cited (Backward Citations)
US2384463A
Cited
US3069486A
Cited
US3174219A
Cited
US3099899A
Cited
US3050576A
Cited
US3326721A
Cited
US3262815A
Cited
US3311505A
Cited
US3447969A
Cited
US3493434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |