US3219484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of sugars and their derivatives
Assignee: Colonial Sugar Refining Co Ltd
•
Filing: 1962-08-02
•
Granted: 1965-11-23
•
Expires: 1982-08-02
Abstract
No abstract record available.
Inventors
- 👤 Smythe Bruce Maxwell
- 👤 Moye Junior Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:43
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06; C13K1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE PURIFICATION OF SOLID SUGARS AND THEIR DERIVATIVES CONSISTING OF DISSOLVING SAID SUGARS OR THEIR DERIVATIVES AT A TEMPERATURE BETWEEN 100*C. AND 200*C. IN AN ANHYDROUS HIGH-BOILING ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL MONOALKYLETHER, ETHYLENE GLYCOL MONOESTER, DIETHYLENE GLYCOL MONOALKYLETHER, DIETHYLENE GLYCOL MONESTER, FURFURYL ALCOHOL, TETRAHYDROFURFURYL ALCOHOL AND 2-HYDROXYMETHYL TETRAHYDROPYRAN; SEPARATING UNDISSOLVED SOLIDS FROM SAID HOT SOLUTION AND SUBSEQUENTLY COOLING THE SOLUTION TO ABOUT AMBIENT TEMPERATURE TO EFFECT CRYSTALLIZATION.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE PURIFICATION OF SOLID SUGARS AND THEIR DERIVATIVES CONSISTING OF DISSOLVING SAID SUGARS OR THEIR DERIVATIVES AT A TEMPERATURE BETWEEN 100*C. AND 200*C. IN AN ANHYDROUS HIGH-BOILING ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL MONOALKYLETHER, ETHYLENE GLYCOL MONOESTER, DIETHYLENE GLYCOL MONOALKYLETHER, DIETHYLENE GLYCOL MONESTER, FURFURYL ALCOHOL, TETRAHYDROFURFURYL ALCOHOL AND 2-HYDROXYMETHYL TETRAHYDROPYRAN; SEPARATING UNDISSOLVED SOLIDS FROM SAID HOT SOLUTION AND SUBSEQUENTLY COOLING THE SOLUTION TO ABOUT AMBIENT TEMPERATURE TO EFFECT CRYSTALLIZATION.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |