US3853625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc fibers and needles and galvanic cell anodes made therefrom
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1972-07-12
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Granted: 1974-12-10
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Expires: 1992-07-12
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
2026-10-28 16:10
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/24; H01M10/26; C; C25; C25C; C25C1/00; C25C1/16; H01M4/00; H01M4/02; H01M4/36; H01M4/38; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S75/00; Y10S75/952
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
STABLE, NONPYROPHORIC, HIGH SURFACE AREA, VIRTUALLY PURE ZINC FILAMENTS HAVING A THIN ELONGATED CENTRAL SPINE PORTION WITH AT LEAST A FEW POLY-DIRECTIONAL SIDES GROWTH OF GRANULAR, DENDRITIC OR PLATELET FORM THE THIN ELONGATED CENTRAL SPINE PORTION CONSISTING ESSENTIALLY OF ONE OR MORE SINGLE CRYSTALS PREFERABLY ORIENTATED WITH AN A AXIS PARALLEL TO THE AXIS OF SAID FILAMENTS, SAID FILAMENTS HAVING A LENGTH OF FROM ABOUT 1/8 TO ABOUT 4 INCHES, AN AVERAGE DIAMETER OF ABOUT 0.0006 INCH,
Claim 2
Dependent Claim
77 words
STABLE, NONPYROPHORIC, HIGH SURFACE AREA, VIRTUALLY PURE ZINC FILAMENTS HAVING A THIN ELONGATED CENTRAL SPINE PORTION WITH AT LEAST A FEW POLY-DIRECTIONAL SIDES GROWTH OF GRANULAR, DENDRITIC OR PLATELET FORM THE THIN ELONGATED CENTRAL SPINE PORTION CONSISTING ESSENTIALLY OF ONE OR MORE SINGLE CRYSTALS PREFERABLY ORIENTATED WITH AN A AXIS PARALLEL TO THE AXIS OF SAID FILAMENTS, SAID FILAMENTS HAVING A LENGTH OF FROM ABOUT 1/8 TO ABOUT 4 INCHES, AN AVERAGE DIAMETER OF ABOUT 0.0006 INCH,
Claim 3
Dependent Claim
46 words
Stable, nonpyrophoric, high surface area, virtually pure zinc fibers in accordance with claim 1 having a thin elongated central spine portion with a number of polydirectional side growths of granular, dendritic or platelet form, and having a length of from about 1/8 to about 2 inches.
Claim 4
Dependent Claim
47 words
Stable, nonpyrophoric, high surface area, virtually pure zinc needles in accordance with claim 1 having a fairly smooth thin elongated central spine portion with a few poly-directional side growths of granular, dendritic or platelet form, and having a length of from about 1/8 to about 4 inches.
Claim 5
Dependent Claim
30 words
The zinc fibers in accordance with claim 2 wherein the grain diameter of the crystals ranges from a minimum of about 0.0002 inch to a maximum of about 0.01 inch.
Claim 6
Dependent Claim
30 words
The zinc needles in accordance with claim 3 wherein the grain diameter of the crystals ranges from a minimum of about 0.0001 inch to a maximum of about 0.002 inch.
Claim 7
Dependent Claim
99 words
Galvanic cell anode fabricated from zinc filaments having a thin elongated central spine portion with at least a few poly-directional side growths, the thin elongated central spine portion consisting essentially of one or more single crystals preferentially orientated with an a axis parallel to the axis of said filaments, said filaments having a length of from about 1/8 to about 4 inches, an average diameter of about 0.006 inch and a specific surface area of between about 0.4 and 0.6 square meter per gram, the individual zinc filaments being thoroughly intermingled and interlocked throughout the body of the anode.
Claim 8
Dependent Claim
99 words
Galvanic cell anode fabricated from zinc filaments having a thin elongated central spine portion with at least a few poly-directional side growths, the thin elongated central spine portion consisting essentially of one or more single crystals preferentially orientated with an a axis parallel to the axis of said filaments, said filaments having a length of from about 1/8 to about 4 inches, an average diameter of about 0.006 inch and a specific surface area of between about 0.4 and 0.6 square meter per gram, the individual zinc filaments being thoroughly intermingled and interlocked throughout the body of the anode.
Claim 9
Dependent Claim
27 words
The galvanic cell anode in accordance with claim 6 having a void volume of at least about 85 per cent of the total volume of the anode.
References Cited (Backward Citations)
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |