Patent US2498918A successfully refreshed from Google Patents.
US2498918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of 5-hydroxymethyl 2-furfural
Assignee: Individual
•
Filing: 1946-10-08
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Granted: 1950-02-28
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Expires: 1966-10-08
Abstract
No abstract record available.
Inventors
- 👤 Haworth Walter Norman
- 👤 Wiggins Leslie Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:34
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
50 words
A PROCESS FOR THE MANUFACTURE OF 5-HYDROXYMETHYL 2-FURFURAL FROM SUCROSE, IN WHICH A SOLUTION OF SUCROSE AND WATER ALONE IS HEATED UNDER PRESSURE IN AN ATMOSPHERE OF HYDROGEN, AND IN WHICH AFTER COOLING AND REMOVAL OF EXTRANEOUS MATTER, THE 5-HYDROXYMETHYL 2-FURFURAL IS OBTAINED FROM THE REACTION MIXTURE BY SOLVENT EXTRACTION.
Claim 2
Dependent Claim
50 words
A PROCESS FOR THE MANUFACTURE OF 5-HYDROXYMETHYL 2-FURFURAL FROM SUCROSE, IN WHICH A SOLUTION OF SUCROSE AND WATER ALONE IS HEATED UNDER PRESSURE IN AN ATMOSPHERE OF HYDROGEN, AND IN WHICH AFTER COOLING AND REMOVAL OF EXTRANEOUS MATTER, THE 5-HYDROXYMETHYL 2-FURFURAL IS OBTAINED FROM THE REACTION MIXTURE BY SOLVENT EXTRACTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |