Patent US4608279A successfully refreshed from Google Patents.
US4608279A
Expired / Lapsed
US
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Galvanic cells having ion exchange resin in their cathode mix
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1984-12-27
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Granted: 1986-08-26
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Expires: 2004-12-27
Abstract
Abstract Galvanic cells of the Leclanche and zinc chloride type which employ cathode mixes having relatively high ratios of EMD to conductive material and which include a minor amount of ion exchange resin in their cathode mixes exhibit enhanced light drain service and comparable heavy drain service relative to conventional cells having lower EMD to conductive material ratios.
Inventors
- 👤 Brooke Schumm, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:57
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/62; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
A galvanic cell comprising an anode; an acidic electrolyte; and a wet cathode mix comprising electrolytic manganese dioxide and a conductive material in a ratio of greater than about 7:1 by weight, and an ion exchange resin in an amount between about 0.5 and 4.0 weight percent of said wet cathode mix.
Claim 2
Dependent Claim
52 words
A galvanic cell comprising an anode; an acidic electrolyte; and a wet cathode mix comprising electrolytic manganese dioxide and a conductive material in a ratio of greater than about 7:1 by weight, and an ion exchange resin in an amount between about 0.5 and 4.0 weight percent of said wet cathode mix.
Claim 3
Dependent Claim
25 words
The galvanic cell of claim 1 wherein the ion exchange resin comprises between about 0.5 and about 1.0 weight percent of the wet cathode mix.
Claim 4
Dependent Claim
13 words
The galvanic cell of claim 1 wherein said cell is a Leclanche cell.
Claim 5
Dependent Claim
16 words
The cell of claim 1 wherein said ion exchange resin is an acid ion exchange resin.
Claim 6
Dependent Claim
16 words
The cell of claim 1 wherein said ion exchange resin is a base ion exchange resin.
Claim 7
Dependent Claim
14 words
The cell of claim 1 wherein said ion exchange resin is a macroreticular resin.
Claim 8
Dependent Claim
28 words
The cell of claim 1 wherein said ion exchange resin is a coarse powder, about 90 weight percent of which will pass through a 20 Tyler mesh screen.
Claim 9
Dependent Claim
27 words
The galvanic cell of claim 1 wherein the conductive material is at least one material selected from the group consisting of carbon black, acetylene black, and graphite.
Claim 10
Dependent Claim
13 words
The galvanic cell of claim 1 wherein the anode is composed of zinc.
Claim 11
Dependent Claim
15 words
The galvanic cell of claim 1 wherein the wet cathode mix additionally includes a surfactant.
Claim 12
Dependent Claim
15 words
The galvanic cell of claim 1 wherein the wet cathode mix additionally includes gum karaya.
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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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |