US4417608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a lead-acid storage battery plate
Assignee: Motors Liquidation Co
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Filing: 1982-06-23
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Granted: 1983-11-29
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Expires: 2002-06-23
Abstract
Abstract A process for dimpling the surface of a pasted Pb-acid storage battery relocates active material from the centers of the active material pellets to the sides thereof more proximate the surrounding grid wires with a consequent increase in surface area of the plate and utilization efficiency of the active material.
Inventors
- 👤 Charles P. McCartney, Jr.
- 👤 Ellis G. Wheadon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:52
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/14; H01M4/16; H01M4/20; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A process for making Pb-acid storgage battery plates comprising the steps of: embedding a conductive grid in a leady active material paste such as to provide a plate having opposing faces and a predetermined thickness of paste between said faces, said grid comprising a network of criss-crossing interconnected grid wires defining a plurality of interstitial openings between said grid wires, said paste residing primarily in said openings; and depressing the paste in substantially the centers of said openings such as to cause said paste to exude substantially radially from said centers to zones of said plate more proximate said grid wires surrounding said openings and to provide a plurality of dimples in at least one of said faces at the centers of said openings, said paste thereafter having a thickness at the bottom of said dimples which is less than said predetermined thickness and a thickness at said zones which is greater than said predetermined thickness.
Claim 2
Dependent Claim
156 words
A process for making Pb-acid storgage battery plates comprising the steps of: embedding a conductive grid in a leady active material paste such as to provide a plate having opposing faces and a predetermined thickness of paste between said faces, said grid comprising a network of criss-crossing interconnected grid wires defining a plurality of interstitial openings between said grid wires, said paste residing primarily in said openings; and depressing the paste in substantially the centers of said openings such as to cause said paste to exude substantially radially from said centers to zones of said plate more proximate said grid wires surrounding said openings and to provide a plurality of dimples in at least one of said faces at the centers of said openings, said paste thereafter having a thickness at the bottom of said dimples which is less than said predetermined thickness and a thickness at said zones which is greater than said predetermined thickness.
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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |