US4089990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate and method of making
Assignee: Individual
•
Filing: 1974-03-14
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Granted: 1978-05-16
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Expires: 1994-03-14
Abstract
Abstract A battery plate is disclosed having a core of aluminum, for example, which has its oxide coating removed and replaced by a thin film of lead. Such a plate has a higher conductivity and is lighter in weight with superior performance characteristics than a conventional lead-antimony plate.
Inventors
- 👤 Henry D. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:43
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/82; H01M4/66; H01M4/68; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A method of producing a coated battery plate comprising: (a) placing a plate to be coated and a supply of lead in a reduced pressure chamber containing an inert gas; (b) connecting said plate as a cathode electrode and the lead as an anode electrode to an electrical power source to produce an electric field; and (c) coating said plate with lead particles dislodged from the anode by ionizing the gas to produce ion bombardment of the electrodes.
Claim 2
Independent Claim
78 words
A method of producing a coated battery plate comprising: (a) placing a plate to be coated and a supply of lead in a reduced pressure chamber containing an inert gas; (b) connecting said plate as a cathode electrode and the lead as an anode electrode to an electrical power source to produce an electric field; and (c) coating said plate with lead particles dislodged from the anode by ionizing the gas to produce ion bombardment of the electrodes.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the plate is aluminum and has a surface coating of aluminum oxide thereon and the step of coating also causes the removal of the aluminum oxide by ion bombardment during the coating process.
Claim 4
Dependent Claim
12 words
The method according to claim 1 wherein the inert gas is Argon.
Claim 5
Independent Claim
45 words
A method of producing a coated battery plate comprising: (a) cleaning said battery plate in a reduced pressure chamber by ion bombardment by ions of an inert gas; (b) depositing a lead film simultaneously on said plate as said plate is cleaned by said bombardment.
Claim 6
Independent Claim
45 words
A method of producing a coated battery plate comprising: (a) cleaning said battery plate in a reduced pressure chamber by ion bombardment by ions of an inert gas; (b) depositing a lead film simultaneously on said plate as said plate is cleaned by said bombardment.
Claim 7
Dependent Claim
26 words
The method according to claim 4 wherein said plate is aluminum and its surface is coated with aluminum oxide which is removed by said ion bombardment.
Claim 8
Dependent Claim
29 words
The method according to claim 4 further including the step of collecting materials removed from the surface of the plate during cleaning to prevent contamination during the deposition process.
Claim 9
Dependent Claim
48 words
The method according to claim 4 wherein the step of depositing a lead film includes the sub-steps of: heating a lead supply in said chamber to its vaporization point, condensing lead on said plate by maintaining said plate at a temperature less than the vaporization point of lead.
Claim 10
Dependent Claim
46 words
The method according to claim 4 further including the step of: adding at least one additional coating of lead by electrochemical plating to produce a porous lead coating eliminating the need for lead paste when the plate so produced is utilized as a negative battery plate.
Claim 11
Dependent Claim
36 words
The method according to claim 4 further including the step of: depositing lead oxide over said lead film to produce a plate which does not require lead oxide paste when utilized as a positive battery plate.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |