Patent US3789742A successfully refreshed from Google Patents.
US4886636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the pore morphology of strengthened silver powder compacts
Assignee: Pulse Electronics Corp
•
Filing: 1988-06-13
•
Granted: 1989-12-12
•
Expires: 2008-06-13
Abstract
Abstract In the manufacture of a porous silver structure made by pressing and sintering silver powder prepared by ion substitution process, porosity of the structure is increased by heat treating the silver prior to pressing and sintering.
Inventors
- 👤 Larry J. Gaudino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:27
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/34; B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F2998/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
In the manufacture of a rigid porous network structure made by pressing and sintering silver prepared by the ion substitution process, the improvement which comprises heat treating the silver prior to pressing and sintering in order to increase the porosity of the structure.
Claim 2
Dependent Claim
43 words
In the manufacture of a rigid porous network structure made by pressing and sintering silver prepared by the ion substitution process, the improvement which comprises heat treating the silver prior to pressing and sintering in order to increase the porosity of the structure.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the heat treating step is performed at about 300° to 700° C.
Claim 4
Dependent Claim
44 words
The process of claim 1 wherein the silver prepared by the ion substitution process consists of agglomerates of partially fused subagglomerate particles and wherein the heat treating step increases the size of the subagglomerate particles without significant change in the size of the agglomerates.
Claim 5
Dependent Claim
44 words
In the manufacture of an electrode for an electrochemical cell made by pressing and sintering silver prepared by the ion substitution process the improvement which comprises heat treating the silver prior to pressing and sintering in order to increase the porosity of the electrode.
Claim 6
Dependent Claim
44 words
In the manufacture of an electrode for an electrochemical cell made by pressing and sintering silver prepared by the ion substitution process the improvement which comprises heat treating the silver prior to pressing and sintering in order to increase the porosity of the electrode.
Claim 7
Dependent Claim
27 words
The process of claim 4 comprising the additional step of anodic oxidation of the pressed and sintered silver in order to convert the silver to silver oxide.
Claim 8
Dependent Claim
46 words
The process of claim 5 wherein the silver is converted to both monovalent silver oxide and divalent silver oxide and wherein the heat treating step is performed at about 400° C. in order that the silver, upon anodic oxidation, be preferentially converted to divalent silver oxide.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |