Patent US3607412A successfully refreshed from Google Patents.
US3607412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate grids
Assignee: ZF International UK Ltd
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Filing: 1968-11-19
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Granted: 1971-09-21
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Expires: 1988-11-19
Abstract
Abstract A method of manufacturing a battery plate grid includes the steps of, placing a conductive battery plate lug having an extension integral therewith in a mould containing an impression of the battery plate grid to be produced. The remainder of the mould is then filled with particles of a synthetic resin material, and the material is heated without the application of pressure, to cause the particles of resin material to adhere to one another. The shape of said extension of the lug is such that the extension is trapped by the resin material. The grid is then removed from the mould and is rendered conductive.
Inventors
- 👤 Frank Raymond Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
A method as claimed in claim 1 wherein the grid is coated with conductive material by spraying the conductive material onto the grid.
Claim 2
Dependent Claim
17 words
A method as claimed in claim 2 wherein said conductive material is molten lead or lead alloy.
Claim 3
Dependent Claim
54 words
A method as claimed in claim 1 wherein the battery plate grid is in the form of a mesh network and said extension of the conductive battery plate lug is in the form of a section of the mesh network of the grid, the members of said portion being surrounded by synthetic resin material.
Claim 4
Dependent Claim
53 words
A method as claimed in claim 1 including the step of wiping the surface of the mould after the mould has been filled with synthetic resin material, and prior to heating the mould, to spread the synthetic resin material evenly in the mould and to remove excess synthetic resin material from the mould.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 5 wherein said lug is formed with raised regions which are left free of synthetic resin material when the mould is wiped.
Claim 6
Dependent Claim
14 words
A method as claimed in claim 1 wherein the mould is formed from aluminum.
Claim 7
Dependent Claim
16 words
A method as claimed in claim 1 wherein the synthetic resin particles are particles of polyvinylchloride.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 8 wherein said particles of polyvinylchloride are hollow and generally spherical.
References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |