US2775508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating pickle liquors
Assignee: Individual
•
Filing: 1951-04-28
•
Granted: 1956-12-25
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Thomsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:52
CPC Classifications
C; C01; C01G; C01G49/00; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR THE TREATMENT OF IRON-BEARING SULFATE SPENT PICKLE LIQUOR FOR THE RECOVERY OF IRON VALUES THEREFROM AND FOR THE MANUFACTURE OF AMMONIUM SULFATE, SAID METHOD INCLUDING THE STEPS OF FORMING A REAGENT SOLUTION CONSISTING ESSENTIALLY OF A MIXTURE OF A SUBSTANTIALLY IRONFREE AQUEOUS SOLUTION OF AMMONIUM SULFATE AND THE REACTION PRODUCTS OF AMMONIA AND CATION DIOXIDE, ADDING A SLIGHT EXCESS OF SAID REAGENT SOLUTION TO PICKLE LIQUOR TO PRECIPITATE PRINCIPALLY AS IRON CARBONATE THE MAJOR PART OF THE IRON RESIDENT IN SAID PICKLE LIQUOR, REMOVING THE SAID IRON PRECIPITATE BY FILTRATION TO PROVIDE A SOLUTION OF AMMONIUM SULFATE, DIVIDING SAID AMMONIUM SULFATE SOLUTION INTO TWO PARTS, RECIRCULATING ONE OF SAID PARTS TO THE FIRST MENTIONED STEP FOR THE PRODUCTION OF SAID REAGENT SOLUTION, AND TREATING THE OTHER OF SAID PARTS FOR THE SEPARATION OF AMMONIUM SULFATE THEREFROM AN CRYSTALLINE FORM.
Claim 2
Independent Claim
142 words
A METHOD FOR THE TREATMENT OF IRON-BEARING SULFATE SPENT PICKLE LIQUOR FOR THE RECOVERY OF IRON VALUES THEREFROM AND FOR THE MANUFACTURE OF AMMONIUM SULFATE, SAID METHOD INCLUDING THE STEPS OF FORMING A REAGENT SOLUTION CONSISTING ESSENTIALLY OF A MIXTURE OF A SUBSTANTIALLY IRONFREE AQUEOUS SOLUTION OF AMMONIUM SULFATE AND THE REACTION PRODUCTS OF AMMONIA AND CATION DIOXIDE, ADDING A SLIGHT EXCESS OF SAID REAGENT SOLUTION TO PICKLE LIQUOR TO PRECIPITATE PRINCIPALLY AS IRON CARBONATE THE MAJOR PART OF THE IRON RESIDENT IN SAID PICKLE LIQUOR, REMOVING THE SAID IRON PRECIPITATE BY FILTRATION TO PROVIDE A SOLUTION OF AMMONIUM SULFATE, DIVIDING SAID AMMONIUM SULFATE SOLUTION INTO TWO PARTS, RECIRCULATING ONE OF SAID PARTS TO THE FIRST MENTIONED STEP FOR THE PRODUCTION OF SAID REAGENT SOLUTION, AND TREATING THE OTHER OF SAID PARTS FOR THE SEPARATION OF AMMONIUM SULFATE THEREFROM AN CRYSTALLINE FORM.
References Cited (Backward Citations)
US997237A
Cited
US1897725A
Cited
US1944327A
Cited
US1983320A
Cited
US1986900A
Cited
US1994702A
Cited
US2201522A
Cited
US2375977A
Cited
US2271524A
Cited
US2258310A
Cited
US2331235A
Cited
US2374454A
Cited
US2443765A
Cited
US2511307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |