US3256270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of d-fructose
Assignee: Roche Diagnostics GmbH
•
Filing: 1962-11-05
•
Granted: 1966-06-14
•
Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Haack Erich
- 👤 Braun Franz
- 👤 Kohler Karlfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:59
CPC Classifications
C; C13; C13K; C13K11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN THE METHOD OF PREPARING D-FRUCTOSE BY THE ISOMERIZATION OF D-GLUCOSE BY THE ACTION OF AQUEOUS ALKALI THEREON, THE IMPROVEMENT WHICH COMPRISES SUBJECTING D-GLUCOSE TO THE ACTION OF AN ALKALI METAL ALUMINATE AT A TEMPERATURE OF FROM 20-80*C., WHEREIN SAID ALKALI METAL ALUMINATE IS EMPLOYED IN AN AMOUNT WHEREBY THE MOLAR RATIO OF ALUMINUM TO GLUCOSE IS IN THE RANGE OF 0.5 TO 1 MOL OF ALUMINUM TO 1 MOL OF GLUCOSE AND THE RATIO OF ALUMINUM TO ALKALI METAL HYDROXIDE IN THE ALKALI METAL ALUMINATE IS FROM 1:1.5 TO 1:2.
Claim 2
Dependent Claim
91 words
IN THE METHOD OF PREPARING D-FRUCTOSE BY THE ISOMERIZATION OF D-GLUCOSE BY THE ACTION OF AQUEOUS ALKALI THEREON, THE IMPROVEMENT WHICH COMPRISES SUBJECTING D-GLUCOSE TO THE ACTION OF AN ALKALI METAL ALUMINATE AT A TEMPERATURE OF FROM 20-80*C., WHEREIN SAID ALKALI METAL ALUMINATE IS EMPLOYED IN AN AMOUNT WHEREBY THE MOLAR RATIO OF ALUMINUM TO GLUCOSE IS IN THE RANGE OF 0.5 TO 1 MOL OF ALUMINUM TO 1 MOL OF GLUCOSE AND THE RATIO OF ALUMINUM TO ALKALI METAL HYDROXIDE IN THE ALKALI METAL ALUMINATE IS FROM 1:1.5 TO 1:2.
References Cited (Backward Citations)
US1401433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |