US2877086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing entrained alkali metal cyanides from ferro-manganese furnace gases
Assignee: Pittsburgh Coke and Chemical Co
•
Filing: 1957-02-08
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Granted: 1959-03-10
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Expires: 1977-02-08
Abstract
No abstract record available.
Inventors
- 👤 Johnstone S Mackay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:21
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/08; C01C3/10; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904; Y10S75/00; Y10S75/961
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A CONTINOUS PROCESS FOR REMOVING ALKALI METAL CYANIDES ENTRAINED WITH FERRO-MANGANESE FURNACE GASES COMPRISING WASHING THE GASES WITH WATER, REMOVING THE FURNACE GASES FROM THE WATER, SEPARATING THE UNDISSOLVED SOLIDS FROM THE SOLUTION OF THE ALKALI MATAL CYANIDES IN THE WATER, RECYCLING THE CYANIDE SOLUTION TO THE GAS WASHER, SAID RECYCLING BEING REPEATED AT LEAST UNTIL A SUBSTANTIAL AMOUNT OF THE ALKALI METAL CYANIDES ARE HYDROLYZED TO HCN, AND CARRYING OFF A SUBSTANTIAL PROPOR-
Claim 2
Dependent Claim
74 words
A CONTINOUS PROCESS FOR REMOVING ALKALI METAL CYANIDES ENTRAINED WITH FERRO-MANGANESE FURNACE GASES COMPRISING WASHING THE GASES WITH WATER, REMOVING THE FURNACE GASES FROM THE WATER, SEPARATING THE UNDISSOLVED SOLIDS FROM THE SOLUTION OF THE ALKALI MATAL CYANIDES IN THE WATER, RECYCLING THE CYANIDE SOLUTION TO THE GAS WASHER, SAID RECYCLING BEING REPEATED AT LEAST UNTIL A SUBSTANTIAL AMOUNT OF THE ALKALI METAL CYANIDES ARE HYDROLYZED TO HCN, AND CARRYING OFF A SUBSTANTIAL PROPOR-
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |