Patent US1805347A successfully refreshed from Google Patents.
Patent US2954282A successfully refreshed from Google Patents.
US2954282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of crystallizing
Assignee: FMC Corp
•
Filing: 1954-12-13
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Granted: 1960-09-27
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Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 William C Bauer
- 👤 Allen P Mccue
- 👤 Kenneth C Rule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/005; C; C01; C01D; C01D7/00; C01D7/22; C01D7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR PREPARING CRYSTALS OF SODIUM SESQUICARBONATE WHICH CRYSTALS ARE IMPROVED IN SIZE, DEWATERING ABILITY AND SETTLING RATE, WHICH COMPRISES FORMING A PLANT SOLUTION OF SODIUM SESQUICARBONATE BY DISSOLVING CRUDE TRONA IN A RECYCLING MOTHER LIQUOR AND CRYSTALLIZING SODIUM SESQUICARBONATE FROM SAID SOLUTION BY EFFECTING THE CRYSTALLIZATION OF SAID SALT FROM SAID SOLUTION IN THE PRESENCE OF ABOUT 5 TO ABOUT 100 PARTS PER MILLION OF AN ANIONIC ACTIVE SURFACTANT SELECTED FROM THE GROUP CONSISTING OF (1) ALKYL BENZENE SULFONATES CONTAINING AT LEAST 8 ALKYL CARBON ATOMS, (2) ALKYL NAPHTHALENE SULFONATES CONTAINING AT LEAST 4 ALKYL CARBON ATOMS, (3) PRIMARY ALKYL ALCOHOL SULFATES CONTAINING AT LEAST 10 CARBON ATOMS, AND (4) N-SUBSTITUTED TAURINES OF THE FORMULA
Claim 2
Dependent Claim
117 words
A PROCESS FOR PREPARING CRYSTALS OF SODIUM SESQUICARBONATE WHICH CRYSTALS ARE IMPROVED IN SIZE, DEWATERING ABILITY AND SETTLING RATE, WHICH COMPRISES FORMING A PLANT SOLUTION OF SODIUM SESQUICARBONATE BY DISSOLVING CRUDE TRONA IN A RECYCLING MOTHER LIQUOR AND CRYSTALLIZING SODIUM SESQUICARBONATE FROM SAID SOLUTION BY EFFECTING THE CRYSTALLIZATION OF SAID SALT FROM SAID SOLUTION IN THE PRESENCE OF ABOUT 5 TO ABOUT 100 PARTS PER MILLION OF AN ANIONIC ACTIVE SURFACTANT SELECTED FROM THE GROUP CONSISTING OF (1) ALKYL BENZENE SULFONATES CONTAINING AT LEAST 8 ALKYL CARBON ATOMS, (2) ALKYL NAPHTHALENE SULFONATES CONTAINING AT LEAST 4 ALKYL CARBON ATOMS, (3) PRIMARY ALKYL ALCOHOL SULFATES CONTAINING AT LEAST 10 CARBON ATOMS, AND (4) N-SUBSTITUTED TAURINES OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |