US3193361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and device for continuously crystallizing iron sulfate hepta-hy-drate fromsulfates of mordanting solutions
Assignee: DR OTTO SAUREBAU U KERAMIKWERKE
•
Filing: 1961-04-07
•
Granted: 1965-07-06
•
Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Niedner Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:23
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/36; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/0036; C01; C01G; C01G49/00; C01G49/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A METHOD OF CONTINUOUSLY CRYSTALLIZING IRON SULFATE-HEPTAHYDRATE FROM SULFATES OF MORDANTING SOLUTIONS, THE STEPS OF: INTRODUCING THE LIQUID TO BE PROCESSED INTO AT LEAST TWO VERTICALLY ARRANGED SUBSTANTIALLY COAXIAL INTERCOMMUNICATING CHAMBERS AND CONTINUOUSLY CIRCULATING THE SAME THERETHROUGH IN A CLOSED PATH SO THAT SAID LIQUID MOVES UPWARDLY IN ONE OF SAID CHAMBERS AND DOWNWARDLY IN THE OTHER CHAMBER SAID CIRCULATION OF THE LIQUID UPWARDLY BEING AT A VELOCITY LESS THAN THE SETTLING RATE OF AT LEAST THE LARGER CRYSTALS TO BE FORMED IN THE SOLUTION, COOLING SAID LIQUID WHILE IT IS BEING CIRCULATED THROUGH AT LEAST ONE OF SAID CHAMBERS TO CAUSE CRYSTAL FORMATION THEREIN, INTRODUCING COMPRESSED PRECOOLED AIR INTO THE LOWER PORTION OF SAID ONE CHAMBER TO CAUSE UPWARD MOVE-
Claim 2
Dependent Claim
122 words
IN A METHOD OF CONTINUOUSLY CRYSTALLIZING IRON SULFATE-HEPTAHYDRATE FROM SULFATES OF MORDANTING SOLUTIONS, THE STEPS OF: INTRODUCING THE LIQUID TO BE PROCESSED INTO AT LEAST TWO VERTICALLY ARRANGED SUBSTANTIALLY COAXIAL INTERCOMMUNICATING CHAMBERS AND CONTINUOUSLY CIRCULATING THE SAME THERETHROUGH IN A CLOSED PATH SO THAT SAID LIQUID MOVES UPWARDLY IN ONE OF SAID CHAMBERS AND DOWNWARDLY IN THE OTHER CHAMBER SAID CIRCULATION OF THE LIQUID UPWARDLY BEING AT A VELOCITY LESS THAN THE SETTLING RATE OF AT LEAST THE LARGER CRYSTALS TO BE FORMED IN THE SOLUTION, COOLING SAID LIQUID WHILE IT IS BEING CIRCULATED THROUGH AT LEAST ONE OF SAID CHAMBERS TO CAUSE CRYSTAL FORMATION THEREIN, INTRODUCING COMPRESSED PRECOOLED AIR INTO THE LOWER PORTION OF SAID ONE CHAMBER TO CAUSE UPWARD MOVE-
References Cited (Backward Citations)
US15119A
Cited
US1256068A
Cited
US1693786A
Cited
US1997277A
Cited
US2288667A
Cited
US2492333A
Cited
US2616790A
Cited
US2470822A
Cited
US2664349A
Cited
US2631926A
Cited
US2827366A
Cited
US2983589A
Cited
US3071447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |