US3131996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sodium carbonate
Assignee: Intermountain Research and Development Corp
•
Filing: 1960-11-28
•
Granted: 1964-05-05
•
Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Seglin Leonard
- 👤 Henry S Winnicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:11
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/12; C01D7/126; C01D7/22; C01D7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
PROCESS FOR PREPARING SODA ASH FRO M CRUDE WYOMING TRONA CONTAINING CALCIUM THEREIN, WHICH COMPRISES CALCINING THE CRUDE TRONA TO CONVERT THE CRUDE TRONA INTO CRUDE SODIUM CARBONATE, SOFTENING THE NATURAL HARD WATERS OF THE REGION WHICH HAVE AN AVERAGE HARDNESS OF ABOUT 270 P.P.M. TOTAL HARDNESS CALCULATED AS CALCIUM CARBONATE, TO A HARDNESS BETWEEN 170 AND 33 P.P.M., ADDING SAID CRUDE SODIUM CARBONATE TO SAID SOFTENED WATER TO FORM AN AQUEOUS SOLUTION OF THE CARBONATE VALUES IN SAID CRUDE SODIUM CARBONATE IN AN AQUEOUS SOLVENT WHOSE AQUEOUS PHASE CONSISTS OF THE NATURAL HARD WATER OF THE REGION SOFTENED TO BETWEEN 170 AND 33 P.P.M. TOTAL HARDNESS CALCULATED AS CALCIUM CARBONATE, CLARIFYING THE AQUEOUS SOLUTION AND SEPARATING THE INSOLUBLES THEREFROM, RECOVERING SODIUM CARBONATE CRYSTALS FROM THE CLARIFIED SOLUTION AND CONVERTING THE CRYSTALS TO SODA ASH.
Claim 2
Dependent Claim
135 words
PROCESS FOR PREPARING SODA ASH FRO M CRUDE WYOMING TRONA CONTAINING CALCIUM THEREIN, WHICH COMPRISES CALCINING THE CRUDE TRONA TO CONVERT THE CRUDE TRONA INTO CRUDE SODIUM CARBONATE, SOFTENING THE NATURAL HARD WATERS OF THE REGION WHICH HAVE AN AVERAGE HARDNESS OF ABOUT 270 P.P.M. TOTAL HARDNESS CALCULATED AS CALCIUM CARBONATE, TO A HARDNESS BETWEEN 170 AND 33 P.P.M., ADDING SAID CRUDE SODIUM CARBONATE TO SAID SOFTENED WATER TO FORM AN AQUEOUS SOLUTION OF THE CARBONATE VALUES IN SAID CRUDE SODIUM CARBONATE IN AN AQUEOUS SOLVENT WHOSE AQUEOUS PHASE CONSISTS OF THE NATURAL HARD WATER OF THE REGION SOFTENED TO BETWEEN 170 AND 33 P.P.M. TOTAL HARDNESS CALCULATED AS CALCIUM CARBONATE, CLARIFYING THE AQUEOUS SOLUTION AND SEPARATING THE INSOLUBLES THEREFROM, RECOVERING SODIUM CARBONATE CRYSTALS FROM THE CLARIFIED SOLUTION AND CONVERTING THE CRYSTALS TO SODA ASH.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |