US2666788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ethylene sulfarylamides
Assignee: BASF SE
•
Filing: 1951-03-10
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Granted: 1954-01-19
•
Expires: 1971-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ebel Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/124; C09B43/1247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE SULFANILIDE WHICH CONSISTS IN MILLING AT ORDINARY TEMPERATURE A MIXTURE OF CARBYL SULFATE AND AT LEAST TWO EQUIVALENTS OF ANILINE IN THE PRESENCE OF AN INERT DILUENT, TREATING THE REACTION MIXTURE WITH AN EXCESS OF AN AQUEOUS CAUSTIC ALKALI SOLUTION AND ACIDIFYING THE AQUEOUS ALKALINE SOLUTION SO OBTAINED.
Claim 2
Dependent Claim
55 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE SULFANILIDE WHICH CONSISTS IN MILLING AT ORDINARY TEMPERATURE A MIXTURE OF CARBYL SULFATE AND AT LEAST TWO EQUIVALENTS OF ANILINE IN THE PRESENCE OF AN INERT DILUENT, TREATING THE REACTION MIXTURE WITH AN EXCESS OF AN AQUEOUS CAUSTIC ALKALI SOLUTION AND ACIDIFYING THE AQUEOUS ALKALINE SOLUTION SO OBTAINED.
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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |