US4542082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bipolar battery plate
Assignee: California Institute of Technology
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Filing: 1982-02-08
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Granted: 1985-09-17
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Expires: 2002-02-08
Abstract
Abstract A liquid-impermeable plate (10) having throughplate conductivity with essentially zero resistance comprises an insulator sheet (12) having a series of spaced perforations (14) each of which contains a metal element (16) sealingly received into the perforation (14). A low-cost plate can readily be manufactured by punching a thermoplastic sheet (40) such as polypropylene with a punching tool (52), filling the apertures with lead spheres (63) having a diameter smaller than the holes (50) but larger than the thickness of the sheet, sweeping excess spheres (62) off the sheet with a doctor blade (60) and then pressing a heated platen (74) onto the sheet to swage the spheres into a cylindrical shape and melt the surrounding resin to form a liquid-impermeable collar (4) sealing the metal into the sheet.
Inventors
- 👤 John J. Rowlette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/02; H01M8/0202; H01M8/0204; H01M8/0221; C; C25; C25B; C25B9/00; C25B9/60; C25B9/65; H01M10/00; H01M10/06; H01M10/18; H01M4/00; H01M4/02; H01M4/64; H01M50/00; H01M50/50; H01M6/00; H01M6/42; H01M6/46; H01M6/48; H01M8/0206; H01M8/0247; H01M8/0256; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
A fluid impervious plate for use as a substrate plate for a storage battery electrode comprising: a thin sheet of organic resin insulator having flat first and opposed faces and including a series of spaced, disconnected apertures extending from said first face to said opposite face; and a fluid-impervious conductor element consisting of metal having a spherically shaped side profile and flat first and second end surfaces sealingly received in each aperture; each conductor element being disconnected from every other conductor element and having said first and second end surfaces coincident with and exposed to said faces.
Claim 2
Dependent Claim
97 words
A fluid impervious plate for use as a substrate plate for a storage battery electrode comprising: a thin sheet of organic resin insulator having flat first and opposed faces and including a series of spaced, disconnected apertures extending from said first face to said opposite face; and a fluid-impervious conductor element consisting of metal having a spherically shaped side profile and flat first and second end surfaces sealingly received in each aperture; each conductor element being disconnected from every other conductor element and having said first and second end surfaces coincident with and exposed to said faces.
Claim 3
Dependent Claim
14 words
A plate according to claim 1 in which the resin is a thermoplastic resin.
Claim 4
Dependent Claim
19 words
A plate according to claim 2 in which the resin has a melting point below that of the metal.
Claim 5
Dependent Claim
13 words
A plate according to claim 2 in which the resin is a polyolefin.
Claim 6
Dependent Claim
12 words
A plate according to claim 4 in which the polyolefin is polypropylene.
Claim 7
Dependent Claim
12 words
A plate according to claim 1 in which the metal is lead.
Claim 8
Dependent Claim
18 words
A plate according to claim 1 in which the conductor element is a pellet swaged into said aperture.
Claim 9
Dependent Claim
18 words
A plate according to claim 1 in which the plate has a thickness from 5 to 100 mils.
Claim 10
Dependent Claim
33 words
A plate according to claim 8 in which the conductor elements are spaced in the plate in a uniform pattern with the distance from center to center being from 150 to 250 mils.
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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |