US2980747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed nickel cadmium cell
Assignee: Union Carbide Corp
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Filing: 1959-08-10
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Granted: 1961-04-18
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Expires: 1979-08-10
Abstract
No abstract record available.
Inventors
- 👤 John L S Daley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; H01M10/24; H01M10/28; H01M10/283; H01M10/42; H01M10/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A SEALED NICKEL CADMIUM SECONDARY CELL OF THE TYPE EMPLOYING AN ANTI-POLAR MASS OF A CATHODIC REDUCIBLE OXIDE AND WHICH COMPRISES A CONTAINER, A COVER FOR SAID CONTAINER, A SEAL GASKET INTERPOSED THEREBETWEEN, A NEGATIVE CADMIUM ELECTRODE, A POSITIVE NICKEL ELECTRODE, A SEPARATOR INTERPOSED THEREBETWEEN, AND AN ALKALINE ELECTROLYTE THROUGHOUT, THE IMPROVEMENT WHICH COMPRISES SAID POSITIVE ELECTRODE CONSISTING OF TWO SEMI-CYLINDRICAL PIECES AND SAID ANTI-POLAR MASS OF A CATHODIC REDUCIBLE OXIDE BEING IN THE FORM OF AUXILIARY NEGATIVE ELECTRODES WHICH ARE SEPARATED BY A SPACER SCREEN OR SHEET AND ARE LOCATED IN SAID CELL BETWEEN AND IN JUXTAPOSITION WITH THE FLAT SURFACES OF SAID SEMI-CYLINDRICAL PIECES OF SAID POSITIVE ELECTRODE.
Claim 2
Dependent Claim
111 words
IN A SEALED NICKEL CADMIUM SECONDARY CELL OF THE TYPE EMPLOYING AN ANTI-POLAR MASS OF A CATHODIC REDUCIBLE OXIDE AND WHICH COMPRISES A CONTAINER, A COVER FOR SAID CONTAINER, A SEAL GASKET INTERPOSED THEREBETWEEN, A NEGATIVE CADMIUM ELECTRODE, A POSITIVE NICKEL ELECTRODE, A SEPARATOR INTERPOSED THEREBETWEEN, AND AN ALKALINE ELECTROLYTE THROUGHOUT, THE IMPROVEMENT WHICH COMPRISES SAID POSITIVE ELECTRODE CONSISTING OF TWO SEMI-CYLINDRICAL PIECES AND SAID ANTI-POLAR MASS OF A CATHODIC REDUCIBLE OXIDE BEING IN THE FORM OF AUXILIARY NEGATIVE ELECTRODES WHICH ARE SEPARATED BY A SPACER SCREEN OR SHEET AND ARE LOCATED IN SAID CELL BETWEEN AND IN JUXTAPOSITION WITH THE FLAT SURFACES OF SAID SEMI-CYLINDRICAL PIECES OF SAID POSITIVE ELECTRODE.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |