Patent US4510219A successfully refreshed from Google Patents.
US4510219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate containing filler with conductive coating
Assignee: California Institute of Technology
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Filing: 1983-11-14
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Granted: 1985-04-09
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Expires: 2003-11-14
Abstract
Abstract The plate (10) comprises a matrix or binder resin phase (12) in which is dispersed particulate, conductive tin oxide such as tin oxide coated glass fibers (14). A monopolar plate (11) is prepared by coating a layer (18) of electrolytically active material onto a surface of the plate (10). Tin oxide is prevented from reduction by coating a surface of the plate (10) with a conductive, impervious layer resistant to reduction such as a thin film (22) of lead adhered to the plate with a layer (21) of conductive adhesive. The plate (10) can be formed by casting a molten dispersion from mixer (36) onto a sheet (30) of lead foil or by passing an assembly of a sheet (41) of resin, a sheet (43) of fiberglass and a sheet (45) of lead between the nip of heated rollers (48, 50).
Inventors
- 👤 John J. Rowlette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; H01M10/00; H01M10/06; H01M10/18; H01M4/14; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
47 words
A through-conductive plate for a lead-acid battery comprising: a sheet of matrix resin containing a dispersion of particles containing a coating of conductive tin oxide that is insoluble in sulfuric acid electrolyte, has a high conductivity, and is thermodynamically stable during charge and discharge of said battery.
Claim 2
Dependent Claim
47 words
A through-conductive plate for a lead-acid battery comprising: a sheet of matrix resin containing a dispersion of particles containing a coating of conductive tin oxide that is insoluble in sulfuric acid electrolyte, has a high conductivity, and is thermodynamically stable during charge and discharge of said battery.
Claim 3
Dependent Claim
17 words
A plate according to claim 1 in which the substrate is in powder, filamentary, or fiber form.
Claim 4
Dependent Claim
24 words
A plate according to claim 2 in which the substrate is a glass fiber having a diameter from about 1 to about 20 microns.
Claim 5
Dependent Claim
26 words
A plate according to claim 3 in which the tin oxide is present as a coating having a thickness from a monolayer to about 10 microns.
Claim 6
Dependent Claim
28 words
A plate according to claim 4 in which the coated fibers are present in the resin in an amount from about 20 to about 80 percent by weight.
Claim 7
Dependent Claim
13 words
A plate according to claim 5 in which the resin is a polyolefin.
Claim 8
Dependent Claim
12 words
A plate according to claim 6 in which the resin is polypropylene.
Claim 9
Dependent Claim
16 words
A plate according to claim 1 having a thickness from about 1 to about 20 mils.
Claim 10
Dependent Claim
17 words
A plate according to claim 1 having at least one electrode layer on a first surface thereof.
Claim 11
Dependent Claim
16 words
A plate according to claim 9 in which the electrode layer comprises a positive active paste.
Claim 12
Dependent Claim
13 words
A plate according to claim 10 in which the paste contains lead oxide.
Claim 13
Dependent Claim
16 words
A plate according to claim 9 in which the electrode layer comprises a negative active paste.
Claim 14
Dependent Claim
24 words
A plate according to claim 12 further including a protective conductive layer interposed between the surface of the plate and the negative active paste.
Claim 15
Dependent Claim
29 words
A plate according to claim 13 in which the protective layer is selected from thin films of metal and a film of resin containing a dispersion of conductive particles.
Claim 16
Dependent Claim
17 words
A plate according to claim 14 in which the particles are fibers selected from lead or graphite.
Claim 17
Dependent Claim
14 words
A plate according to claim 13 in which the negative active paste contains lead.
Claim 18
Dependent Claim
22 words
A plate according to claim 1 in which the additive is in the form of a sheet of tin oxide coated glass.
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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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |