US2831044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnation of positive plates by thermal decomposition of aqueous nickel nitrate
Assignee: Individual
•
Filing: 1956-12-13
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Granted: 1958-04-15
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Expires: 1976-12-13
Abstract
No abstract record available.
Inventors
- 👤 Pierre L Bourgault
- 👤 Phyllis E Lake
- 👤 Edmund J Casey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:39
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/28; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF IMPREGNATING A POROUS SINTERED NICKEL PLAQUE WITH NICKEL HYDROXIDE WHICH COMPRISES IMMERSING THE PLAQUE IN A MOLTEN BATH OF NI(NO3)26H2O, ROASTING THE PLAQUE WHICH HAS BEEN SUBJECTED TO SAID IMMERSION, AT A TEMPERATURE OF FROM ABOUT 180* C TO ABOUT 250* C. FOR A PERIOD OF AT LEAST ABOUT TEN MINUTES, WHEREBY TO DECOMPOSE THE NICKEL NITRATE INTO A PRODUCT INTERMEDIATE BETWEEN NICKEL NITRATE AND NICKEL HYDROXIDE, AND CONVERTING SAID INTERMEDIATE PRODUCT INTO NICKEL HYDROXIDE BY IMMERSING THE PLAQUE IN HOT CONCENTRATED CAUSTIC SOLUTION, PRIOR TO WASHING AND DRYING THE THUS-TREATED PLAQUE.
Claim 2
Independent Claim
95 words
A METHOD OF IMPREGNATING A POROUS SINTERED NICKEL PLAQUE WITH NICKEL HYDROXIDE WHICH COMPRISES IMMERSING THE PLAQUE IN A MOLTEN BATH OF NI(NO3)26H2O, ROASTING THE PLAQUE WHICH HAS BEEN SUBJECTED TO SAID IMMERSION, AT A TEMPERATURE OF FROM ABOUT 180* C TO ABOUT 250* C. FOR A PERIOD OF AT LEAST ABOUT TEN MINUTES, WHEREBY TO DECOMPOSE THE NICKEL NITRATE INTO A PRODUCT INTERMEDIATE BETWEEN NICKEL NITRATE AND NICKEL HYDROXIDE, AND CONVERTING SAID INTERMEDIATE PRODUCT INTO NICKEL HYDROXIDE BY IMMERSING THE PLAQUE IN HOT CONCENTRATED CAUSTIC SOLUTION, PRIOR TO WASHING AND DRYING THE THUS-TREATED PLAQUE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |