Patent US1720376A successfully refreshed from Google Patents.
Patent US2791497A successfully refreshed from Google Patents.
US2791497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing light metal powders
Assignee: BASF SE
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Filing: 1954-04-20
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Granted: 1957-05-07
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Expires: 1974-04-20
Abstract
No abstract record available.
Inventors
- 👤 Schlecht Leo
- 👤 Klippel Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F9/305
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN THE PROCESS FOR THE PRODUCTION OF NICKEL POWDER ESPECIALLY SUITABLE TO BE PROCESED TO POROUS ELECTRODE FRAMEWORKS FOR ACCUMULATORS BY POWDER-MEALLURGICAL METHODS AND HVING A BULK DENSITY OFF A FEW TENTHS OF ONE KG. PER LITRE BY THE THERMAL DECOMPOSITION OF NICKEL CARBONYL IN THE FREE SPACE OF A HEATED VESSEL THE STEP WHICH CONSISTS IN KEEPING THE TEMPERATURE OF THE WALL OF THE VESSEL ABOUT 300* TO 350* C. HIGHER THAN THE TEMPERATURE IN THE MIDDLE OF THE FREE SPACE OF THE VESSEL AND KEEPING SAID INTERNAL TEMPERATURE AS FAR AS POSSIBLE BELOW 300* C.
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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |