US4035909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a miniature concentric battery
Assignee: Duracell Inc USA
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Filing: 1976-01-19
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Granted: 1977-07-19
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Expires: 1996-01-19
Abstract
Abstract A miniature cell 0.1 inch diameter, and 0.75 long using lithium/sulphur dioxide electrolyte complex; and the method of preparing it.
Inventors
- 👤 Arabinda N. Dey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:17
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M50/00; H01M50/10; H01M50/172; H01M50/174; H01M50/182; H01M6/30; H01M6/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A method of making a miniature electric cell comprising the steps of inserting a cathode, an anode and a separator into a cylindrical metal container; inserting a sealing element into the open end of said container with said sealing element having an unobstructed, hollow, tubular element extending therethrough; permanently sealing said container to said sealing element; introducing a fluid electrolyte from an electrolyte reservoir into said sealed container through said sealing element via said unobstructed, hollow, tubular element; separating said hollow tubular element from said reservoir and permanently preventing said electrolyte from escaping from said container via said tubular element.
Claim 2
Independent Claim
100 words
A method of making a miniature electric cell comprising the steps of inserting a cathode, an anode and a separator into a cylindrical metal container; inserting a sealing element into the open end of said container with said sealing element having an unobstructed, hollow, tubular element extending therethrough; permanently sealing said container to said sealing element; introducing a fluid electrolyte from an electrolyte reservoir into said sealed container through said sealing element via said unobstructed, hollow, tubular element; separating said hollow tubular element from said reservoir and permanently preventing said electrolyte from escaping from said container via said tubular element.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said electrolyte is prevented from escaping from said container via said hollow tube by closing said tube above said sealing element.
Claim 4
Dependent Claim
36 words
The method of claim 1 wherein a difference in pressure is created in order to force said electrolyte from said reservior into said container by maintaining said reservior at a temperature above that of the container.
Claim 5
Dependent Claim
50 words
The method of claim 1 wherein said sealing element has a solid linear element therethrough and wherein said electrolyte is prevented from escaping from said container via said hollow tube by removing said tube from said sealing element whereby said sealing element resiliently seals the opening caused by said removal.
Claim 6
Dependent Claim
12 words
The method of claim 2 wherein said fluid electrolyte comprises sulfur dioxide.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |