US2741637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for obtaining sulphur-free oximes from oxime-sulphur mixtures
Assignee: Bayer AG
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Filing: 1953-01-23
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Granted: 1956-04-10
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Expires: 1973-01-23
Abstract
No abstract record available.
Inventors
- 👤 Welz Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:17
CPC Classifications
C; C07; C07C; C07C249/00; C07C249/04; C07C249/14; C07C249/08; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
PROCESS FOR OBTAINING SULPHUR-FREE OXIMES FROM OXIME-SULPHUR MIXTURES OBTAINED BY REDUCING SALTS OF MONONITROCYCLOALKANES WITH HYDROGEN SULPHIDE IN AN ACID SOLUTION, WHICH COMPRISES EXTRACTING THE MIXTURES WITH CAUSTIC ALKALI SOLUTION AND NEUTRALIZING THE SOLUTION THUS OBTAINED WITH HYDROGEN SULPHIDE.
Claim 2
Dependent Claim
39 words
PROCESS FOR OBTAINING SULPHUR-FREE OXIMES FROM OXIME-SULPHUR MIXTURES OBTAINED BY REDUCING SALTS OF MONONITROCYCLOALKANES WITH HYDROGEN SULPHIDE IN AN ACID SOLUTION, WHICH COMPRISES EXTRACTING THE MIXTURES WITH CAUSTIC ALKALI SOLUTION AND NEUTRALIZING THE SOLUTION THUS OBTAINED WITH HYDROGEN SULPHIDE.
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) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |