Patent US3072466A successfully refreshed from Google Patents.
US3072466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of crystallizing sodium bicarbonate
Assignee: FMC Corp
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Filing: 1960-08-12
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Granted: 1963-01-08
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Expires: 1980-08-12
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
2026-11-05 13:08
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/38; C01D7/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR PREPARING CRYSTALS OF SODIUM BICARBONATE WHICH CRYSTALS ARE IMPROVED IN SIZE, DEWATERING ABILITY AND SETTLING RATE, WHICH COMPRISES EFFECTING THE CRYSTALLIZATION OF SODIUM BICARBONATE CRYSTALS FROM AN AQUEOUS SOLUTION IN THE PRESENCE OF ABOUT 10 TO ABOUT 800 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 R''R"NCH2CH2SO3M WHERE R'' IS A HYDROCARBON RADICAL, R" IS THE ACYL RADICAL OF A HIGHER FATTY ACID AND M IS AN ALKALI METAL.
Claim 2
Dependent Claim
118 words
A PROCESS FOR PREPARING CRYSTALS OF SODIUM BICARBONATE WHICH CRYSTALS ARE IMPROVED IN SIZE, DEWATERING ABILITY AND SETTLING RATE, WHICH COMPRISES EFFECTING THE CRYSTALLIZATION OF SODIUM BICARBONATE CRYSTALS FROM AN AQUEOUS SOLUTION IN THE PRESENCE OF ABOUT 10 TO ABOUT 800 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 R''R"NCH2CH2SO3M WHERE R'' IS A HYDROCARBON RADICAL, R" IS THE ACYL RADICAL OF A HIGHER FATTY ACID AND M IS AN ALKALI METAL.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |