US2533723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic amine-ketone condensation
Assignee: Nopco Chemical Co
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Filing: 1947-07-28
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Granted: 1950-12-12
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Expires: 1967-07-28
Abstract
No abstract record available.
Inventors
- 👤 Bernard A Dombrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:54
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60; C07C249/00; C07C249/02; C07C209/62; C07C209/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR THE PRODUCTIONOF A SCHIFF''S BASE BY RECTING A NON-OLEFINIC KETONE WHICH CONTAINS AT LEAST FIVE CARBON ATOMS PER MOLECULE WITH A PRIMARY AMINE, THE REACTION BETWEEN THE KETONE AND THE AMINE RESULTING IN THE LINKING BY A DOUBLE BOND OF THE CARBONYL CARBON ATOM OF THE KETONE TO THE NITROGEN ATOM OF THE PRIMARY AMINE GROUP OF THE PRIMARY AMINE COMPOUND WITH THE SPLITTING OUT OF WATER, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION BETWEEN THE KETONE AND THE PRIMARY AMINE UNDER NON-HYDROGENATING CONDITIONS IN THE PRESENCE OF A SURFACE ACTIVE CLAY CATALYST.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR THE PRODUCTIONOF A SCHIFF''S BASE BY RECTING A NON-OLEFINIC KETONE WHICH CONTAINS AT LEAST FIVE CARBON ATOMS PER MOLECULE WITH A PRIMARY AMINE, THE REACTION BETWEEN THE KETONE AND THE AMINE RESULTING IN THE LINKING BY A DOUBLE BOND OF THE CARBONYL CARBON ATOM OF THE KETONE TO THE NITROGEN ATOM OF THE PRIMARY AMINE GROUP OF THE PRIMARY AMINE COMPOUND WITH THE SPLITTING OUT OF WATER, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION BETWEEN THE KETONE AND THE PRIMARY AMINE UNDER NON-HYDROGENATING CONDITIONS IN THE PRESENCE OF A SURFACE ACTIVE CLAY CATALYST.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |