US3020195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of potassium compounds
Assignee: Magnera Corp
•
Filing: 1960-02-29
•
Granted: 1962-02-06
•
Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 Casciani Ferri
- 👤 Harry D Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:16
CPC Classifications
C; C01; C01D; C01D7/00; D; D21; D21C; D21C11/00; D21C11/0035; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE PULPING OF LIGNEOUS CELLULOSIC MATERIALS WITH POTASSIUM BASE COOKING LIQUIRS, THE PROCESS OF PREPARING SOLUTIONS OF POTASSIUM SALTS OF CARBONIC ACID COMPRISING THE STEPS OF, ADDING POTASSIUM SULFATE TO SPENT POTASSIUM BASE COOKING LIQUOR IN AN AMOUNT SUBSTANTIALLY IN EXCESS OF THAT REQUIRED TO REPLENISH LOSSES RESULTING FROM THE PULPING AND RECOVERY OPERATION, BURNING SAID SPENT LIQUOR TO PRODUCE A SMELT COMPRISING POTASSIUM CARBONATE AND POTASSIUM SULFIDE, DISSOLVING SAID SMELT TO PRODUCT A SMELT SOLUTION COMPRISING POTASSIUM CARBONATE AND POTASSIUM SULFIDE, AND CARBONATING AT LEAST A PORTION OF SAID SMELT SOLUTION WITH A GAS CONTAINING CARBON DIOXIDE TO GENERATE HYDROGEN SULFIDE GAS AND THEREBY PRODUCE A SOLUTION OF POTASSIUM SALTS OF CARBONIC ACID.
Claim 2
Dependent Claim
115 words
IN THE PULPING OF LIGNEOUS CELLULOSIC MATERIALS WITH POTASSIUM BASE COOKING LIQUIRS, THE PROCESS OF PREPARING SOLUTIONS OF POTASSIUM SALTS OF CARBONIC ACID COMPRISING THE STEPS OF, ADDING POTASSIUM SULFATE TO SPENT POTASSIUM BASE COOKING LIQUOR IN AN AMOUNT SUBSTANTIALLY IN EXCESS OF THAT REQUIRED TO REPLENISH LOSSES RESULTING FROM THE PULPING AND RECOVERY OPERATION, BURNING SAID SPENT LIQUOR TO PRODUCE A SMELT COMPRISING POTASSIUM CARBONATE AND POTASSIUM SULFIDE, DISSOLVING SAID SMELT TO PRODUCT A SMELT SOLUTION COMPRISING POTASSIUM CARBONATE AND POTASSIUM SULFIDE, AND CARBONATING AT LEAST A PORTION OF SAID SMELT SOLUTION WITH A GAS CONTAINING CARBON DIOXIDE TO GENERATE HYDROGEN SULFIDE GAS AND THEREBY PRODUCE A SOLUTION OF POTASSIUM SALTS OF CARBONIC ACID.
References Cited (Backward Citations)
US1728252A
Cited
US2054727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |