Patent US3030376A successfully refreshed from Google Patents.
US3030376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 4-methylimidazole from glucose
Assignee: Zeneca Inc
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Filing: 1960-03-21
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Granted: 1962-04-17
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Expires: 1980-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert W Liggett
- 👤 Jr Harmon L Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:20
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS OF PREPARING 4-METHYLINIDAZOLE BY REACTING DEXTROSE WITH AMMONIUM IONS AND FORMALDEHYDE IN THE PRESENCE OF A ZINC COMPOUND TO PRODUCE A ZINC COMPLEX, TREATING THE COMPLEX TO REMOVE THE ZINC, AND RECOVERING 4-METHYLIMIDAZOLE, THE IMPROVEMENT OF USING ZINC CARBONATE AS THE ZINC COMPOUND AND CARRYING OUT THE SAID REACTION AT A TEMPERATURE BETWEEN ABOUT 60*C. AND ABOUT 11K*C.
Claim 2
Dependent Claim
61 words
IN A PROCESS OF PREPARING 4-METHYLINIDAZOLE BY REACTING DEXTROSE WITH AMMONIUM IONS AND FORMALDEHYDE IN THE PRESENCE OF A ZINC COMPOUND TO PRODUCE A ZINC COMPLEX, TREATING THE COMPLEX TO REMOVE THE ZINC, AND RECOVERING 4-METHYLIMIDAZOLE, THE IMPROVEMENT OF USING ZINC CARBONATE AS THE ZINC COMPOUND AND CARRYING OUT THE SAID REACTION AT A TEMPERATURE BETWEEN ABOUT 60*C. AND ABOUT 11K*C.
References Cited (Backward Citations)
DE183588C
Cited
US2728763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |