US2899440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
PROCESS FOR THE MANUFACTURE OF DI-IMIDAZOLE DERIVATIVE WHICH COMPRISES REACTION IN THE PRESENCE OF A DILUTE AQUEOUS MINERAL ACID AND IN THE ABSENCE OF ORGANIC SOLVENTS AT A TEMPERATURE WITHIN THE RANGE OF 80 TO 120* C., ABOUT TWO MOLECULAR PROPORTIONS OF AN AROMATIC ORTHODIAMINE OF WHICH ONE AMINO GROUP IS PRIMARY AND THE OTHER AMINO GROUP IS AT MOST SECONDARY, WITH ONE MOLECULAR PROPORTION OF A COMPOUND WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
78 words
PROCESS FOR THE MANUFACTURE OF DI-IMIDAZOLE DERIVATIVE WHICH COMPRISES REACTION IN THE PRESENCE OF A DILUTE AQUEOUS MINERAL ACID AND IN THE ABSENCE OF ORGANIC SOLVENTS AT A TEMPERATURE WITHIN THE RANGE OF 80 TO 120* C., ABOUT TWO MOLECULAR PROPORTIONS OF AN AROMATIC ORTHODIAMINE OF WHICH ONE AMINO GROUP IS PRIMARY AND THE OTHER AMINO GROUP IS AT MOST SECONDARY, WITH ONE MOLECULAR PROPORTION OF A COMPOUND WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2488094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |