Patent US3611974A successfully refreshed from Google Patents.
Patent US2750394A successfully refreshed from Google Patents.
US2750394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of 5-hydroxymethyl 2-furfural
Assignee: FOOD CHEMICAL AND RES LAB Inc
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Filing: 1952-05-22
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Granted: 1956-06-12
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Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Quintin P Peniston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:18
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN THE METHOD OF PRODUCING 5-HYDROXYMEHTYL 2-FURFURAL BY HEAT-REACTING UNDER PRESSURE IN THE PRESENCE OF AN ACIDIC CATALYST AND BETWEEN THE TEMPERATURE LIMITS OF ABOUT 130* C. AND ABOUT 225* C. AN AQUEOUS SOLUTION OF A KETONE-HEXOSE SUGAR, SAID CATALYST BEING STABLE AT THE TEMPERATURE AT WHICH THE SUGAR SOLUTION IS REACTED, THE STEP OF ACCLERATING THE RATE OF FORMATION OF THE 5-HYDROXYMETHYL 2-FURFURAL RELATIVE TO THE RATE OF ITS DECOMPOSITION BY HAVING PRESENT IN SAID AQUEOUS SOLUTION AN UNSUBSTITUTED, SATURATED ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 1 TO 5 CARBON ATOMS IN ITS MOLECULE, THE MOLAR RATIO OF THE ALCOHOL TO THE WATER IN SAID SOLUTION BEING BETWEEN THE LIMITS OF 0.1 AND 0.4
Claim 2
Dependent Claim
114 words
IN THE METHOD OF PRODUCING 5-HYDROXYMEHTYL 2-FURFURAL BY HEAT-REACTING UNDER PRESSURE IN THE PRESENCE OF AN ACIDIC CATALYST AND BETWEEN THE TEMPERATURE LIMITS OF ABOUT 130* C. AND ABOUT 225* C. AN AQUEOUS SOLUTION OF A KETONE-HEXOSE SUGAR, SAID CATALYST BEING STABLE AT THE TEMPERATURE AT WHICH THE SUGAR SOLUTION IS REACTED, THE STEP OF ACCLERATING THE RATE OF FORMATION OF THE 5-HYDROXYMETHYL 2-FURFURAL RELATIVE TO THE RATE OF ITS DECOMPOSITION BY HAVING PRESENT IN SAID AQUEOUS SOLUTION AN UNSUBSTITUTED, SATURATED ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 1 TO 5 CARBON ATOMS IN ITS MOLECULE, THE MOLAR RATIO OF THE ALCOHOL TO THE WATER IN SAID SOLUTION BEING BETWEEN THE LIMITS OF 0.1 AND 0.4
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |