US3145231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the reduction of halo nitro aromatic compounds
Assignee: EIDP Inc
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Filing: 1962-04-09
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Granted: 1964-08-18
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Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Kosak John Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:28
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C209/365; C07C211/00; C07C211/43; C07C211/44; C07C211/45; C07C211/46; C07C211/49; C07C211/50; C07C211/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR MINIMIZING THE FORMATION OF DEHALOGENATED PRODUCTS DURING THE PREPARATION OF HALOGEN SUBSTITUTED AROMATIC AMINES BY THE CATALYTIC HYDROGENATION OF NITRO MONOCARBOCYCLIC AROMATIC HYDROCARBONS BEARING 1 TO 2 HALOGENS TAKEN FROM THE GROUP CONSISTING OF CI AND BR, WHICH PROCESS COMPRISES EFFECTING THE REDUCTION OF SAID NITRO COMPOUNDS, AT TEMPERATURES OF FROM 30 TO 150*C. AND HYDROGEN GAS PRESSURES OF AT LEAST ABOUT 100 P.S.I.G. IN THE PRESENCE OF (A) A PLATINUM HYDROGENATION CATALYST, IN AMOUNT PROVIDING ONE PART OF PT FOR EVERY 10,000 TO 100,000 PARTS BY WEIGHT OF SAID NITRO COMPOUND, AND (B) A CYCLOALIPHATIC NITROGEN BASE HAVING THE FORMULA
Claim 2
Dependent Claim
104 words
A PROCESS FOR MINIMIZING THE FORMATION OF DEHALOGENATED PRODUCTS DURING THE PREPARATION OF HALOGEN SUBSTITUTED AROMATIC AMINES BY THE CATALYTIC HYDROGENATION OF NITRO MONOCARBOCYCLIC AROMATIC HYDROCARBONS BEARING 1 TO 2 HALOGENS TAKEN FROM THE GROUP CONSISTING OF CI AND BR, WHICH PROCESS COMPRISES EFFECTING THE REDUCTION OF SAID NITRO COMPOUNDS, AT TEMPERATURES OF FROM 30 TO 150*C. AND HYDROGEN GAS PRESSURES OF AT LEAST ABOUT 100 P.S.I.G. IN THE PRESENCE OF (A) A PLATINUM HYDROGENATION CATALYST, IN AMOUNT PROVIDING ONE PART OF PT FOR EVERY 10,000 TO 100,000 PARTS BY WEIGHT OF SAID NITRO COMPOUND, AND (B) A CYCLOALIPHATIC NITROGEN BASE HAVING THE FORMULA
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |