US2949389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of levulose
Assignee: DAWE S LAB Inc
•
Filing: 1958-03-17
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Granted: 1960-08-16
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Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Justin J Murtaugh
- 👤 John J Mahieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:48
CPC Classifications
C; C13; C13K; C13K11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE METHOD OF MAXIMIZING THE RECOVERY OF LEVULOSE FROM A SYRUP SOLUTION CONTAINING LEVULOSE AND LEVULOSE POLYMERS WITH A CRYSTALLIZATION INHIBITING COMPONENT PRESENT IN THE SYRUP WHICH COMPRISES ACIDIFYING THE SOLUTION BY ADDITION OF A STRONG ACID TO ADJUST THE PH TO BELOW 4, DIGESTING THE MIXTURE AT A TEMPERATURE BELOW 80* C., CONCENTRATING THE SOLUTION BY THE EVAPORATION OF WATER, ALLOWING THE CONCENTRATED SOLUTION TO STAND TO CRYSTALLIZE LEVULOSE FROM THE SOLUTION, AND THEN SEPARATING THE CRYSTALS OF LEVULOSE FROM THE SOLUTION.
Claim 2
Independent Claim
83 words
THE METHOD OF MAXIMIZING THE RECOVERY OF LEVULOSE FROM A SYRUP SOLUTION CONTAINING LEVULOSE AND LEVULOSE POLYMERS WITH A CRYSTALLIZATION INHIBITING COMPONENT PRESENT IN THE SYRUP WHICH COMPRISES ACIDIFYING THE SOLUTION BY ADDITION OF A STRONG ACID TO ADJUST THE PH TO BELOW 4, DIGESTING THE MIXTURE AT A TEMPERATURE BELOW 80* C., CONCENTRATING THE SOLUTION BY THE EVAPORATION OF WATER, ALLOWING THE CONCENTRATED SOLUTION TO STAND TO CRYSTALLIZE LEVULOSE FROM THE SOLUTION, AND THEN SEPARATING THE CRYSTALS OF LEVULOSE FROM THE SOLUTION.
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |