Patent US2929823A successfully refreshed from Google Patents.
US2929823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 5-hydroxymethylfurfural
Assignee: Merck and Co Inc
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Filing: 1956-11-26
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Granted: 1960-03-22
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Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 John D Garber
- 👤 Robert E Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:23
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
THE IMPROVED CONTINUOUS PROCESS FOR THE CONVERSION OF A COMPOUND OF THE GROUP CONSISTING OF GLUCOSE, FRUCTOSE, INVERT SUGAR, FRUCTOSANS, SUCROSE, HYDROLYZED WOOD AND STARCH INTO 5-HYDROXYMETHYL FURFURAL, WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OF THE COMPOUND TO A TEMPERATURE IN THE RANGE OF 250* TO 380*C. FOR FROM 0.1 SECOND TO 120 SECONDS TO FORM 5-HYDROXYMETHLY FURFURAL, FORMING WITH THE 5-HYDROXYMETHYL FURFURAL A BLACK TAR-LIKE MATERIAL THAT IS FLUID AT THE REACTIOIN TEMPERATURE AND SOLUBLE IN ORGANIC SOLVENTS OF THE GROUP CONSISTING OF FURFURAL, ETHYL ACETATE, FORMAMIDE AND DIMETHYL FORMAMIDE, ADDING AN ORGANIC SOLVENT TO THE AQUEOUS SOLUTION UNDERGOING CONVERSION TO DISSOLVE 5-HYEROXYMETHYL FURFURAL AND THE TAR-LIKE MATERIAL, AND SEPARATING THE 5-HYDROXYMETHYL FURFURAL FROM THE TAR-LIKE MATERIAL.
References Cited (Backward Citations)
GB600871A
Cited
US2750394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |