US2701249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2-mercapto-5, 6-dimethylbenzimidazole and 5, 6-dimethylbenzimidazole
Assignee: Merck and Co Inc
•
Filing: 1951-01-30
•
Granted: 1955-02-01
•
Expires: 1971-01-30
Abstract
No abstract record available.
Inventors
- 👤 Frank R Koniuszy
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:32
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
THE PROCESS FOR PREPARING 5,6-DIMETHYLBENZIMIDAZOLE WHICH COMPRISES REACTING 1,2-DIMETHYL-4,5-DIAMINOBENZENE WITH CARBON DISULFIDE, RECOVERING 2 MERCAPTO-5,6-DIMETHYLBENZIMIDAZOLE FROM THE RESULTING REACTION PRODUCT. AND HEATING SAID PRODUCT WITH RANEY NICKEL.
Claim 2
Dependent Claim
27 words
THE PROCESS FOR PREPARING 5,6-DIMETHYLBENZIMIDAZOLE WHICH COMPRISES REACTING 1,2-DIMETHYL-4,5-DIAMINOBENZENE WITH CARBON DISULFIDE, RECOVERING 2 MERCAPTO-5,6-DIMETHYLBENZIMIDAZOLE FROM THE RESULTING REACTION PRODUCT. AND HEATING SAID PRODUCT WITH RANEY NICKEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |