US2582258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and degradation of steroid amines
Assignee: Akzo Nobel Paints LLC
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Filing: 1949-09-17
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Granted: 1952-01-15
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Expires: 1969-09-17
Abstract
No abstract record available.
Inventors
- 👤 Percy L Julian
- 👤 Edwin W Meyer
- 👤 Schroeder Ralph
- 👤 Magnani Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:58
CPC Classifications
C; C07; C07J; C07J41/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE PROCESS WHICH COMPRISES CONVERTING A PRIMARY STEROID AMINE HAVING THE AMINE GROUP ATTACHED TO A CARBON ATOM CARRYING A HYDROGEN ATOM TO A SECONDARY METHYL AMINE BY CONDENSING THE STEROID AMINE WITH AN ALDEHYDE TO FORM A SCHIFF''S BASE, TREATING THE SCHIFF''S BASE WITH A METHYL HALIDE, AND HYDROLYZING THE RESULTING QUATERNARY HALIDE, TREATING THE SECONDARY AMINE WITH HYPOCHLORITE TO FORM THE MONOCHLORAMINE, REMOVING THE ELEMENTS OF HCL FROM THE CHLORAMINE AND HYDROLYZING THE RESULTING IMINE TO FORM A CARBONYL-CONTAINING STEROID IN WHICH THE CARBON ATOM INITIALLY BEARING THE -NH2 GROUP NOW BEARS DOUBLE BONDED OXYGEN.
Claim 2
Dependent Claim
97 words
THE PROCESS WHICH COMPRISES CONVERTING A PRIMARY STEROID AMINE HAVING THE AMINE GROUP ATTACHED TO A CARBON ATOM CARRYING A HYDROGEN ATOM TO A SECONDARY METHYL AMINE BY CONDENSING THE STEROID AMINE WITH AN ALDEHYDE TO FORM A SCHIFF''S BASE, TREATING THE SCHIFF''S BASE WITH A METHYL HALIDE, AND HYDROLYZING THE RESULTING QUATERNARY HALIDE, TREATING THE SECONDARY AMINE WITH HYPOCHLORITE TO FORM THE MONOCHLORAMINE, REMOVING THE ELEMENTS OF HCL FROM THE CHLORAMINE AND HYDROLYZING THE RESULTING IMINE TO FORM A CARBONYL-CONTAINING STEROID IN WHICH THE CARBON ATOM INITIALLY BEARING THE -NH2 GROUP NOW BEARS DOUBLE BONDED OXYGEN.
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) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |