US2826489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of gas-pure metals and alloys
Assignee: Nyby Bruk AB
•
Filing: 1954-12-16
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Granted: 1958-03-11
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Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Wagner Anton Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:30
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/05; C21; C21C; C21C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF REMOVING DISSOLVED GAS FROM A METAL MELT WHICH COMPRISES PASSING ANOTHER GAS WHICH IS RELATIVELY INSOLUBLE IN THE METAL MELT OVER THE IMMEDIATE SURFACE OF THE MELT TO REMOVE THE BOUNDARY LAYER BETWEEN THE GAS ATMOSPHERE ABOVE THE METAL MELT AND THE SURFACE ATMOSPHERE OF SAID WASHING GAS.
Claim 2
Independent Claim
51 words
A METHOD OF REMOVING DISSOLVED GAS FROM A METAL MELT WHICH COMPRISES PASSING ANOTHER GAS WHICH IS RELATIVELY INSOLUBLE IN THE METAL MELT OVER THE IMMEDIATE SURFACE OF THE MELT TO REMOVE THE BOUNDARY LAYER BETWEEN THE GAS ATMOSPHERE ABOVE THE METAL MELT AND THE SURFACE ATMOSPHERE OF SAID WASHING GAS.
References Cited (Backward Citations)
US1810801A
Cited
US1847555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |