US3203879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing positive electrodes
Assignee: Union Carbide Corp
•
Filing: 1961-01-17
•
Granted: 1965-08-31
•
Expires: 1981-01-17
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/32; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD OF PREPARING A POSITIVE ELECTRODE FOR USE IN NICKEL-CADMIUM GALVANIC CELLS WHICH COMPRISES THE STEPS OF PREPARING A PLATING BATH OF MOLTEN NICKEL NITRATE HYDRATE, IMMERSING IN SAID BATH OF MOLTEN NICKEL NITRATE HYDRATE, IMMERSING IN SAID BATH A SINTERED NICKEL PLAQUE AND AT LEAST ONE SHEET OF MATERIAL CHOSEN FROM THE GROUP CONSISTING OF NICKEL AND NICKEL ALLOYS, PASSING A CURRENT THROUGH SAID BATH UTILIZING SAID SHEET AS AN ANODE AND SAID PLAQUE AS A CATHODE, AND AT THE SAME TIME ADDING SUFFICIENT QUANTITIES OF NITRIC ACID TO SAID BATH TO MAINTAIN THE PH THEREOF IN THE RANGE OF FROM 0 TO 1.5, THEREBY CAUSING THE FORMATION OF AN ACTIVE NICKEL MATERIAL IN THE PORES OF SAID PLAQUE, SAID PLAQUE THEN BEING SUITABLE FOR USE AS THE POSITIVE ELECTRODE OF A NICKEL-CADMIUM GALVANIC CELL.
Claim 2
Independent Claim
137 words
A METHOD OF PREPARING A POSITIVE ELECTRODE FOR USE IN NICKEL-CADMIUM GALVANIC CELLS WHICH COMPRISES THE STEPS OF PREPARING A PLATING BATH OF MOLTEN NICKEL NITRATE HYDRATE, IMMERSING IN SAID BATH OF MOLTEN NICKEL NITRATE HYDRATE, IMMERSING IN SAID BATH A SINTERED NICKEL PLAQUE AND AT LEAST ONE SHEET OF MATERIAL CHOSEN FROM THE GROUP CONSISTING OF NICKEL AND NICKEL ALLOYS, PASSING A CURRENT THROUGH SAID BATH UTILIZING SAID SHEET AS AN ANODE AND SAID PLAQUE AS A CATHODE, AND AT THE SAME TIME ADDING SUFFICIENT QUANTITIES OF NITRIC ACID TO SAID BATH TO MAINTAIN THE PH THEREOF IN THE RANGE OF FROM 0 TO 1.5, THEREBY CAUSING THE FORMATION OF AN ACTIVE NICKEL MATERIAL IN THE PORES OF SAID PLAQUE, SAID PLAQUE THEN BEING SUITABLE FOR USE AS THE POSITIVE ELECTRODE OF A NICKEL-CADMIUM GALVANIC CELL.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |