US3126413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of calcium and magnesium im-
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:11
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/82; C07C209/84; C07C209/30; C07C209/32; C07C209/36; C07C209/62; C07C209/68; C07C211/00; C07C211/43; C07C211/44; C07C211/45; C07C211/46; C07C211/49; C07C211/50; C07C211/51; C07C211/54; C07C211/55
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
IN THE CATALYTIC REDUCTIVE ALKYLATION OF NITROANILINE CONTAINING CALCIUM AND MAGNESIUM IMPURITIES WITH A CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF KETONES AND ALKEHYDES, THE IMPROVEMENT WHICH COMPRISES FORMING A SOLUTION OF SAID NITROANILINE IN SAID CARBONYL COMPOUND, TREATING SAIS SOLUTON WITH A CATION EXCHANGE RESIN TO REMOVE CALCIUM AND MAGNESIUM IMPURITIES ORIGIALLY CONTAINED IN SAID NITROANILINE, WITHDRAWING TREATED SOLUTION OF NITROANILINE IN SAID CARBONYL COMPOUND REDUCED IN IMPURITIES, AND SUBJECTING THE SAME WITH HYDROGEN TO CATALYTIC REDUCTIVE ALKYLATION IN THE PRESENCE OF A PLATINUM-CONTAINING CATALYST AT A TEMPERATURE OF FROM ABOUT 110* TO ABOUT 250*C. AND A PRESSURE OF FROM ABOUT 100 TO 3000 P.S.I.G.
References Cited (Backward Citations)
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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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |