Patent US4225422A successfully refreshed from Google Patents.
Patent US4209479A successfully refreshed from Google Patents.
US4209479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for improving manufacture of solid state cells
Assignee: Duracell Inc USA
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Filing: 1977-11-25
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Granted: 1980-06-24
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Expires: 1997-11-25
Abstract
Abstract The manufacture of solid state cells with smearable cathode materials subject to radial expansion during cell discharge is improved by the consolidation of such materials within a radially rigid non-flexible wall-retaining member which serves as a jig for the cathode during the fabrication of the cell, and which is thereafter retained in the cell structure to control such radial expansion.
Inventors
- 👤 Philip B. Gunther
- 👤 Robert Nikitopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:13
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/188; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A method for the manufacture of solid state cells comprising the steps of placing a radially rigid non-flexible wall retaining member within a compression die cavity, placing a smearable cathode material into said wall retaining member, with said wall retaining member separating said cathode material from the walls of said die, placing and compressing a solid electrolyte onto said cathode material, compressing an anode material onto said electrolyte, and retaining said wall retaining member as a component of said cell wherein said wall retaining member encloses all of the height of said cathode and at most, part of the height of said electrolyte.
Claim 2
Independent Claim
103 words
A method for the manufacture of solid state cells comprising the steps of placing a radially rigid non-flexible wall retaining member within a compression die cavity, placing a smearable cathode material into said wall retaining member, with said wall retaining member separating said cathode material from the walls of said die, placing and compressing a solid electrolyte onto said cathode material, compressing an anode material onto said electrolyte, and retaining said wall retaining member as a component of said cell wherein said wall retaining member encloses all of the height of said cathode and at most, part of the height of said electrolyte.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said cathode is consolidated within said wall-retaining member prior to the compressing of said solid electrolyte onto said cathode.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said wall-retaining member is a closed ended cup.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said wall-retaining member is a ring.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein the top of said cathode material is compressed to a level below the upper end of said wall-retaining member.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said smearable cathode material contains lead.
Claim 8
Dependent Claim
26 words
The method of claim 6 wherein said smearable cathode material further includes a member of the group consisting of lead iodide, lead sulfide, and mixtures thereof.
Claim 9
Dependent Claim
16 words
The method of claim 7 wherein said anode is lithium and said electrolyte contains lithium iodide.
Claim 10
Dependent Claim
22 words
The method of claim 1 wherein said wall-retaining member is a cup partially open at its bottom with a concentrically circular cutout.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein said open ended cup is comprised of stainless steel.
References Cited (Backward Citations)
US3198862A
Cited
US3988164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |