Patent US3844838A successfully refreshed from Google Patents.
US3844838A
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US
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Alkaline cells with anodes made from zinc fibers and needles
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1972-03-13
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Granted: 1974-10-29
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Expires: 1992-03-13
Abstract
Abstract Stable, high surface area, virtually pure zinc filaments and in particular zinc fibers and needles having a unique crystal structure consisting essentially of one or more single crystals preferentially orientated with an a axis parallel to the axis of the filament. The zinc fibers and needles are prepared by the electrolysis of a soluble zinc salt-containing electrolyte solution under conditions of extremely high cathode current density. Galvanic cell anodes are fabricated using the zinc fibers or needles by compression molding techniques.
Inventors
- 👤 D Louzos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:24
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M10/00; H01M10/24; H01M10/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
AN ALKALINE GALVANIC CELL HAVING AN ANODE, A CATHODE AND AN ALKALINE ELECTROLYTE IN CONTACT THEREWITH, SAID ANODE COMPRISING A POROUS, ELECTROLYTE ABSORBENT, COHESIVE, SELFSUPPORTING BODY OF INTERMINING AND INTERLOCKED ZINC FILAMENTS CHARACTERIZED BY HAVING A THIN ELONGATED CEBTRAL SPINE PORTION WITH AT LEAST A FEW POLYDIRECTIONAL SIDE GROWTHS OF GRANULAR DENDRITIC OR PLATELET FORM, THE THIN ELONGATED CENTRAL SPINE PORTION CONSISTING ESSENTIALLY OF ONE OR MORE SINGLE CRYSTALS PERFERNIALLY ORIENTED WITH AN A AXIS PARALLEL TO THE AXIS OF THE FILAMENT, SAID FILAMENTS HAVING A LENGTH OF FROM ABOUT 1 8 TO ABOUT 4 INCHES, AN AVERAGE DIAMETER OF ABOUT 0.006
Claim 2
Dependent Claim
102 words
AN ALKALINE GALVANIC CELL HAVING AN ANODE, A CATHODE AND AN ALKALINE ELECTROLYTE IN CONTACT THEREWITH, SAID ANODE COMPRISING A POROUS, ELECTROLYTE ABSORBENT, COHESIVE, SELFSUPPORTING BODY OF INTERMINING AND INTERLOCKED ZINC FILAMENTS CHARACTERIZED BY HAVING A THIN ELONGATED CEBTRAL SPINE PORTION WITH AT LEAST A FEW POLYDIRECTIONAL SIDE GROWTHS OF GRANULAR DENDRITIC OR PLATELET FORM, THE THIN ELONGATED CENTRAL SPINE PORTION CONSISTING ESSENTIALLY OF ONE OR MORE SINGLE CRYSTALS PERFERNIALLY ORIENTED WITH AN A AXIS PARALLEL TO THE AXIS OF THE FILAMENT, SAID FILAMENTS HAVING A LENGTH OF FROM ABOUT 1 8 TO ABOUT 4 INCHES, AN AVERAGE DIAMETER OF ABOUT 0.006
Claim 3
Dependent Claim
41 words
The alkaline galvanic cell in accordance with claim 1 wherein the filaments are zinc fibers having a thin elongated central spine portion with a number of poly-directional side growths and having a length of from about 1/8 to about 2 inches.
Claim 4
Dependent Claim
42 words
The alkaline galvanic cell in accordance with claim 1 wherein the filaments are zinc needles having a thin smooth elongated central spine portion with only a few poly-directional side growths and having a length of from about 1/8 to about 4 inches.
Claim 5
Dependent Claim
22 words
The alkaline galvanic cell in accordance with claim 1 wherein the filaments contain less thAn about 1.5 parts per million of iron.
Claim 6
Dependent Claim
25 words
The alkaline galvanic cell in accordance with claim 1 wherein the filaments are amalgamated with at least about 3 per cent by weight of mercury.
Claim 7
Dependent Claim
29 words
The alkaline galvanic cell in accordance with claim 1 wherein the cathode is an oxidic compound selected from the group consisting of manganese dioxide, nickel oxide and silver oxide.
Claim 8
Dependent Claim
20 words
The alkaline galvanic cell in accordance with claim 1 wherein the alkaline electrolyte is a concentrated solution of potassium hydroxide.
Claim 9
Dependent Claim
35 words
The alkaline galvanic cell in accordance with claim 1 wherein the alkaline electrolyte comprises an aqueous solution of from about 40 to 45 per cent potassium hydroxide and 12.5 to 15 per cent zinc oxide.
Claim 10
Dependent Claim
35 words
The alkaline galvanic cell in accordance with claim 1 wherein the alkaline electrolyte contains at least about 20 parts per million of an additive selected from the group consisting of plumbites, arsenates, molybdates and tungstates.
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |