US4091178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable alkaline MnO2 -zinc cell
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1977-09-01
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Granted: 1978-05-23
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Expires: 1997-09-01
Abstract
Abstract The rechargeable cell comprises a cathode formed from a compressed mixture of manganese dioxide particles, electrically conductive particles and a binder; an anode separated from the cathode and containing amalgamated metallic zinc particles on an electrically conductive carrier in an amount sufficient to provide a limited anode discharge capacity of about one-third of the cathode capacity; an aqueous alkaline electrolyte; and a charge reserve mass comprising an oxide or hydroxide of zinc in an amount sufficient to provide a charge reserve capacity for said cell equal to at least 50 percent of the anode discharge capacity.
Inventors
- 👤 Karl Victor Kordesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:03
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/24; H01M10/34; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A rechargeable alkaline MnO 2 -zinc cell comprising: a cathode composed of a compressed mixture of manganese dioxide particles, electrically conductive particles and a binder; an anode containing amalgamated metallic zinc particles on an electrically conductive carrier, said zinc particles having a predetermined discharge capacity of no greater than about one-third of the discharge capacity of said cathode; a separator member for separating said cathode from said anode; an aqueous alkaline electrolyte; and a charge reserve mass in contact with said anode and comprising an oxide or hydroxide of zinc in an amount sufficient to provide a charge reserve capacity for said cell equal to at least about 50 percent of said predetermined anode discharge capacity.
Claim 2
Dependent Claim
116 words
A rechargeable alkaline MnO 2 -zinc cell comprising: a cathode composed of a compressed mixture of manganese dioxide particles, electrically conductive particles and a binder; an anode containing amalgamated metallic zinc particles on an electrically conductive carrier, said zinc particles having a predetermined discharge capacity of no greater than about one-third of the discharge capacity of said cathode; a separator member for separating said cathode from said anode; an aqueous alkaline electrolyte; and a charge reserve mass in contact with said anode and comprising an oxide or hydroxide of zinc in an amount sufficient to provide a charge reserve capacity for said cell equal to at least about 50 percent of said predetermined anode discharge capacity.
Claim 3
Dependent Claim
36 words
A rechargeable cell as defined in claim 1 wherein said oxide or hydroxide of zinc is zinc oxide in an amount equal to from between about 50 to 200 percent of said predetermined anode discharge capacity.
Claim 4
Dependent Claim
30 words
A rechargeable cell as defined in claim 2 wherein said zinc oxide is present in an amount equal to from between about 100-150 percent of said predetermined anode discharge capacity.
Claim 5
Dependent Claim
51 words
A rechargeable cell as defined in claim 2 wherein said anode comprises a perforated metal carrier formed from a non-corroding electrically conductive material selected from the group consisting of amalgamated copper, brass, bronze, silver, lead, or zinc and a coating applied to said metal carrier which includes said amalgamated zinc particles.
Claim 6
Dependent Claim
23 words
A rechargeable cell as defined in claim 4 wherein said coating further includes amalgamated particles of copper intermixed with said amalgamated zinc particles.
Claim 7
Dependent Claim
17 words
A rechargeable cell as defined in claim 5 wherein said metal carrier is composed of amalgamated copper.
Claim 8
Dependent Claim
30 words
A rechargeable cell as defined in claim 6 wherein the amount of said coated amalgamated copper particles lies in a range of between about 20-40% of said anode discharge capacity.
Claim 9
Dependent Claim
28 words
A rechargeable cell as defined in claim 6 wherein said cell is of a cylindrical geometry and wherein said anode and cathode are arranged concentric to one another.
Claim 10
Dependent Claim
22 words
A rechargeable cell as defined in claim 8 wherein said metal carrier has a convoluted geometry with at least a slight overlap.
Claim 11
Dependent Claim
34 words
A rechargeable cell as defined in claim 9 wherein said cathode is of a tubular configuration surrounding said anode and wherein said charge reserve mass is located substantially in the center of said cell.
Claim 12
Dependent Claim
29 words
A rechargeable cell as defined in claim 9 wherein said anode is cylindrically disposed about said cathode and wherein said charge reserve mass forms an annulus around said anode.
Claim 13
Dependent Claim
41 words
A rechargeable cell as defined in claim 10 wherein the separator member of said cell is composed of a non-fibrous regenerated cellulose membrane located contiguous to said metal anode carrier and a superimposed fibrous non-oxidizable separator layer contiguous to said cathode.
Claim 14
Dependent Claim
36 words
A rechargeable cell as defined in claim 12 wherein said charge reserve mass further comprises a binder material selected from the group consisting of natural and synthetic rubbers, polysulfone, acrylic polymers, epoxy resins, polystyrene and polytetrafluoroethylene.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |