US3766203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing imidazoline compounds
Assignee: Ajinomoto Co Inc
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Filing: 1971-12-27
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Granted: 1973-10-16
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Expires: 1991-12-27
Abstract
Abstract IMIDAZOLINE COMPOUNDS ARE PREPARED IN HIGH YIELD AND IN HIGH PURITY BY REACTING A 1,2-DIAMINE COMPOUND OR AN N-SUBSTITUTED 1,2-DIAMINE COMPOUND WITH A NITRILE COMPOUND IN THE PRESENCE OF A CATALYSTIC AMOUNT OF CYSTEINE OR CYSTINE.
Inventors
- 👤 S Sumida
- 👤 T Hachiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16
Claims Analysis
Total Claims: 0
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |