Patent JPS5728952A successfully refreshed from Google Patents.
Patent JPS5687328A successfully refreshed from Google Patents.
Patent US3440023A successfully refreshed from Google Patents.
US3440023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Obtaining kci from crude salts by equilibrating and diluting prior to precipitation
Assignee: Kali-Forschungs Institut
•
Filing: 1966-09-02
•
Granted: 1969-04-22
•
Expires: 1986-09-02
Abstract
No abstract record available.
Inventors
- 👤 Hans Hoppe
- 👤 Heinz Scherzberg
- 👤 Gunter Doring
- 👤 Wolfgang Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:50
CPC Classifications
C; C05; C05D; C05D1/00; C05D1/04; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF MAKING POTASSIUM CHLORIDE, COMPRISING THE STEPS OF DISSOLVING SOLID CRUDE POTASSIUM CHLORIDE CONTAINING SALT IN WATER, HEATING THE SOLUTION AND SEPARATING THE HOT SOLUTION FROM ANY REMAINING CRUDE SALT, ADDING POTASSIUM CHLORIDE TO SAID PURIFIED HOT SOLUTION, VIGOROUSLY AGITATING SAID HOT SOLUTION WITH SAID POTASSIUM CHLORIDE UNTIL SATURATED WITH POTASSIUM CHLORIDE AND AN EQUILIBRIUM RATIO IS ACHIEVED CORRESPONDING TO THE PREVAILING TEMPERATURE, SEPARATING SODIUM CHLORIDE WHICH DEPOSITS FROM THE HOT SATURATED SOLUTION, ADDING WATER TO SAID HOT SOLUTION IN AN AMOUNT SUFFICIENT TO PRECLUDE PRE-
Claim 2
Independent Claim
88 words
A METHOD OF MAKING POTASSIUM CHLORIDE, COMPRISING THE STEPS OF DISSOLVING SOLID CRUDE POTASSIUM CHLORIDE CONTAINING SALT IN WATER, HEATING THE SOLUTION AND SEPARATING THE HOT SOLUTION FROM ANY REMAINING CRUDE SALT, ADDING POTASSIUM CHLORIDE TO SAID PURIFIED HOT SOLUTION, VIGOROUSLY AGITATING SAID HOT SOLUTION WITH SAID POTASSIUM CHLORIDE UNTIL SATURATED WITH POTASSIUM CHLORIDE AND AN EQUILIBRIUM RATIO IS ACHIEVED CORRESPONDING TO THE PREVAILING TEMPERATURE, SEPARATING SODIUM CHLORIDE WHICH DEPOSITS FROM THE HOT SATURATED SOLUTION, ADDING WATER TO SAID HOT SOLUTION IN AN AMOUNT SUFFICIENT TO PRECLUDE PRE-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |