Patent US1417093A successfully refreshed from Google Patents.
Patent US6442398B1 successfully refreshed from Google Patents.
Patent US4477686A successfully refreshed from Google Patents.
US4332870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cell having a gelled anode containing a polyhydric alcohol
Assignee: Duracell Inc USA
•
Filing: 1981-03-09
•
Granted: 1982-06-01
•
Expires: 2001-03-09
Abstract
Abstract A method for forming a gelled anode in which a powdered anode metal is mixed with means for maintaining a uniform mixture of the powdered metal and a gelling agent, the gelling agent is added, and the mixture is fed into an aqueous electrolyte in the cell whereupon a gel is formed in situ.
Inventors
- 👤 Frank E. Parsen
- 👤 Teresita O. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:37
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M4/62; H01M4/621
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
An electrochemical cell comprising an anode, an aqueous alkaline electrolyte solution, a separator and a cathode, said anode comprising a gelled anode comprising a mixture of a powdered metal, a polyhydric alcohol, a portion of the aqueous alkaline electrolyte solution, and a gelling agent.
Claim 2
Dependent Claim
44 words
An electrochemical cell comprising an anode, an aqueous alkaline electrolyte solution, a separator and a cathode, said anode comprising a gelled anode comprising a mixture of a powdered metal, a polyhydric alcohol, a portion of the aqueous alkaline electrolyte solution, and a gelling agent.
Claim 3
Dependent Claim
28 words
The cell of claim 1 wherein the polyhydric alcohol is present in an effective amount up to about 2.5 percent of the weight of the powdered anode metal.
Claim 4
Dependent Claim
33 words
The cell of claim 1 wherein the polyhydric alcohol is selected from the group consisting of glycerine, ethylene glycol, diethylene glycol, triethylene glycol, liquid polyethylene glycols, propylene glycol, trimethylene glycol, and tetramethylene glycol.
Claim 5
Dependent Claim
11 words
The cell of claim 1 wherein the polyhydric alcohol comprises glycerine.
Claim 6
Dependent Claim
30 words
The cell of claim 4 wherein the glycerine is present in an amount of from about 0.1 percent to about 0.4 percent of the weight of the powdered anode metal.
Claim 7
Dependent Claim
11 words
The cell of claim 1 wherein the powdered metal comprises zinc.
Claim 8
Dependent Claim
21 words
The cell of claim 1 wherein the gelling agent comprises a carbohydrate backbone having a water soluble side chain grafted thereon.
Claim 9
Dependent Claim
36 words
The cell of claim 1 wherein the gelling agent comprises water-insoluble salts of an aqueous alkali saponified material wherein the material comprises a galatenized starch backbone having at least one water soluble side chain grafted thereon.
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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |