US3320139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing negative electrodes
Assignee: Union Carbide Corp
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Filing: 1965-01-21
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Granted: 1967-05-16
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Golben Michael
- 👤 Gustav A Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:52
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/28; H01M4/29; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF PREPARING A NEGATIVE ELECTRODE FOR USE IN ALKALINE GALVANIC CELLS WHICH COMPRISES THE STEPS OF PREPARING A PLATING BATH FROM AN AQUEOUS SOLUTION OF CADMIUM NIRERW (CD(NO32)FIMMERSING IN SAID BATH A CONDUCTIVE METAL MATRIX HAVING OPEN INTERSTICES EACH EXTENDING THROUGH THE MATRIX AND OF A SUBSTANTIALLY UNIFORM SIZE, AND ALSO IMMERSING IN SAID BATH AT LEAST ONE ELECTRODE OF CADMIUM METAL; THEN PASSING A CURRENT THROUGH SAID BATH UTILIZING THE CADMIUM ELECTRODE AS AN ANODE AND SAID CONDUCTIVE MATRIX AS A CATHODE, AND AT THE SAME TIME ADDING A SUFFICIENT QUANTITY OF NITRIC ACID TO SAID BATH TO MAINTAIN THE PH THEREOF IN THE RANGE OF 1.4 TO 2.3, THEREBY DEPOSITING AN ADHERING NITROGEN-CADMIUM HYDROXIDE COMPLEX IN THE INTERSTICES OF SAID CONDUCTIVE MATRIX AND ON OTHER SURFACES THEREOF, THE AMOUNT OF SAID COMPLEX DEPOSITED BEING SUFFICIENT TO COMPLETELY FILL SAID INTERSTICES.
Claim 2
Independent Claim
144 words
A METHOD OF PREPARING A NEGATIVE ELECTRODE FOR USE IN ALKALINE GALVANIC CELLS WHICH COMPRISES THE STEPS OF PREPARING A PLATING BATH FROM AN AQUEOUS SOLUTION OF CADMIUM NIRERW (CD(NO32)FIMMERSING IN SAID BATH A CONDUCTIVE METAL MATRIX HAVING OPEN INTERSTICES EACH EXTENDING THROUGH THE MATRIX AND OF A SUBSTANTIALLY UNIFORM SIZE, AND ALSO IMMERSING IN SAID BATH AT LEAST ONE ELECTRODE OF CADMIUM METAL; THEN PASSING A CURRENT THROUGH SAID BATH UTILIZING THE CADMIUM ELECTRODE AS AN ANODE AND SAID CONDUCTIVE MATRIX AS A CATHODE, AND AT THE SAME TIME ADDING A SUFFICIENT QUANTITY OF NITRIC ACID TO SAID BATH TO MAINTAIN THE PH THEREOF IN THE RANGE OF 1.4 TO 2.3, THEREBY DEPOSITING AN ADHERING NITROGEN-CADMIUM HYDROXIDE COMPLEX IN THE INTERSTICES OF SAID CONDUCTIVE MATRIX AND ON OTHER SURFACES THEREOF, THE AMOUNT OF SAID COMPLEX DEPOSITED BEING SUFFICIENT TO COMPLETELY FILL SAID INTERSTICES.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |