US4260669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline-MnO2 cell having a zinc powder-gel anode containing starch graft copolymer
Assignee: Edgewell Personal Care Brands LLC
•
Filing: 1980-03-14
•
Granted: 1981-04-07
•
Expires: 2000-03-14
Abstract
Abstract An alkaline-MnO 2 cell employing a zinc powder-gel anode in which the gelling agent is starch graft copolymer with or without one or more other gelling agent such as sodium carboxymethyl cellulose.
Inventors
- 👤 Catherine A. Kerg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/622; H01M4/06; H01M6/00; H01M6/22; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
33 words
A powder-gel anode comprising a major portion of a consumable zinc anodic material, a minor amount of a starch-graft copolymer in which the copolymer contains carboxylate units, and an aqueous alkaline electrolyte solution.
Claim 2
Dependent Claim
33 words
A powder-gel anode comprising a major portion of a consumable zinc anodic material, a minor amount of a starch-graft copolymer in which the copolymer contains carboxylate units, and an aqueous alkaline electrolyte solution.
Claim 3
Dependent Claim
15 words
The powder-gel anode of claim 1 wherein the consumable zinc anodic material is a powder.
Claim 4
Dependent Claim
28 words
The powder-gel anode of claim 2 wherein the starch graft copolymer is present in an amount between about 0.7 and about 3% by weight of the anodic material.
Claim 5
Dependent Claim
28 words
The powder-gel anode of claim 3 wherein the starch graft copolymer is present in an amount between about 0.8 and about 1.2% by weight of the anodic material.
Claim 6
Dependent Claim
42 words
The powder-gel anode of claim 1 wherein a minor amount of at least one gelling agent selected from the group consisting of carboxymethyl cellulose, methyl cellulose, polyacrylates, hydroxyl alkyl cellulose, polyacrylamide, polymethacrylic acid and poly-N-vinyl pyrrolidone is contained in the powder-gel anode.
Claim 7
Dependent Claim
37 words
The powder-gel anode of claim 5 wherein the starch graft copolymer varies between about 0.5 and about 1.5 percent and the carboxymethyl cellulose between about 2 and about 3 percent based on the weight of the zinc.
Claim 8
Dependent Claim
20 words
The powder-gel anode of claim 1, 2, 3, 4, 5, or 6 wherein the electrolyte solution is aqueous potassium hydroxide.
Claim 9
Dependent Claim
44 words
An alkaline-MnO 2 cell employing an aqueous alkaline electrolyte solution and a powder-gel anode comprising a major portion of a consumable zinc anodic material, a minor amount of a starch graft copolymer in which the copolymer contains carboxylate units, and an aqueous electrolyte solution.
Claim 10
Dependent Claim
44 words
An alkaline-MnO 2 cell employing an aqueous alkaline electrolyte solution and a powder-gel anode comprising a major portion of a consumable zinc anodic material, a minor amount of a starch graft copolymer in which the copolymer contains carboxylate units, and an aqueous electrolyte solution.
Claim 11
Dependent Claim
15 words
The alkaline-MnO 2 cell of claim 8 wherein the electrolyte solution is aqueous potassium hydroxide.
Claim 12
Dependent Claim
34 words
The alkaline-MnO 2 cell of claim 8 or 9 wherein the starch graft copolymer is present in an amount between about 0.7 and about 3% by weight of the anodic material in the cell.
Claim 13
Dependent Claim
32 words
The alkaline-MnO 2 cell of claim 8 or 9 wherein the starch graft copolymer is present in an amount between about 0.5 and about 5% by weight of the total electrolyte solution.
Claim 14
Dependent Claim
39 words
The alkaline-MnO 2 cell of claim 8 or 9 wherein the powder-gel anode contains at least one gelling agent selected from the group consisting of carboxymethyl cellulose, methyl cellulose, polyacrylates, hydroxyl alkyl cellulose, polyacrylamide, polymethacrylic acid and poly-N-vinyl pyrrolidone.
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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |