Patent US2816896A successfully refreshed from Google Patents.
US2816896A
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Process for the production of 2, 3, 5, 6 tetrahydro-1-imidaz (1, 2-a) imidazole
Assignee: Monsanto Canada Inc
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Filing: 1957-01-28
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Granted: 1957-12-17
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Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Mckay Arthur Ferguson
- 👤 Braun Ross Oliver
- 👤 Paris Gerard Yvon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:28
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS FOR MAKING 2,3,5,6-TETRAHYDRO-L-IMIDAZ (1,2,-A) IMIDAZOLE, COMPRISING HEATING 1-(BETA-AMINOETHYL)-2-IMIDAZOLIDINETHIONE IN A SOLVENT MEDIUM IN THE PRESENCE OF CHLOROACETIC ACID AS A DESULFURIZATION AGENT.
Claim 2
Dependent Claim
24 words
A PROCESS FOR MAKING 2,3,5,6-TETRAHYDRO-L-IMIDAZ (1,2,-A) IMIDAZOLE, COMPRISING HEATING 1-(BETA-AMINOETHYL)-2-IMIDAZOLIDINETHIONE IN A SOLVENT MEDIUM IN THE PRESENCE OF CHLOROACETIC ACID AS A DESULFURIZATION AGENT.
References Cited (Backward Citations)
US2782205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |