US2965656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing substituted 1-amino-2, 4-benzene-disulfonamides
Assignee: Merck and Co Inc
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Filing: 1957-11-07
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Granted: 1960-12-20
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Novello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:13
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/30; C07C311/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PREPARING DISULFAMYLANILINE COMPOUNDS COMPRISING HEATING BETWEEN ABOUT 50-100*C. A SOLUTION OF A HALONITROBENZENE HAVING ONE OF THE STRUCTURES
Claim 2
Dependent Claim
21 words
A PROCESS FOR PREPARING DISULFAMYLANILINE COMPOUNDS COMPRISING HEATING BETWEEN ABOUT 50-100*C. A SOLUTION OF A HALONITROBENZENE HAVING ONE OF THE STRUCTURES
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |