US3256350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of halogenated aromatic compounds
Assignee: Monsanto Chemicals Ltd
•
Filing: 1962-08-27
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Granted: 1966-06-14
•
Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Mccall Ernest Bryson
- 👤 Cummings William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/35
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
61 words
A PROCESS CONSISTING ESSENTIALLY OF HEATING, IN A LIQUID PHASE, AT A TEMPERATURE OF AT LEAST ABOUT 125*C. AND IN THE PRESENCE OF A SUBSTANTIALLY INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF HALOGENATED AROMATIC HYDROCARBONS HAVING AT LEAST HALF OF THE NUCLEAR HYDROGEN ATOMS REPLACED BY HALOGEN ATOMS AND PERHALOGENATED SATURATED ALIPHATIC HYDROCARBONS, AN AROMATIC SULFONYL HALIDE OF THE FORMULA:
Claim 2
Dependent Claim
61 words
A PROCESS CONSISTING ESSENTIALLY OF HEATING, IN A LIQUID PHASE, AT A TEMPERATURE OF AT LEAST ABOUT 125*C. AND IN THE PRESENCE OF A SUBSTANTIALLY INERT SOLVENT SELECTED FROM THE GROUP CONSISTING OF HALOGENATED AROMATIC HYDROCARBONS HAVING AT LEAST HALF OF THE NUCLEAR HYDROGEN ATOMS REPLACED BY HALOGEN ATOMS AND PERHALOGENATED SATURATED ALIPHATIC HYDROCARBONS, AN AROMATIC SULFONYL HALIDE OF THE FORMULA:
Claim 3
Dependent Claim
54 words
A PROCESS CONSISTING ESSENTIALLY OF HEATING, IN A LIQUID PHASE AT A TEMPERATURE OF AT LEAST ABOUT 125*C., IN THE PRESENCE OF A SUBSTANTIALLY INERT ORGANIC SOLVENT, AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER, PLATINUM, PALLADIUM AND THE HALIDES THEREOF, AN AROMATIC SULFONYL HALIDE OF THE FORMULA:
Claim 4
Dependent Claim
54 words
A PROCESS CONSISTING ESSENTIALLY OF HEATING, IN A LIQUID PHASE AT A TEMPERATURE OF AT LEAST ABOUT 125*C., IN THE PRESENCE OF A SUBSTANTIALLY INERT ORGANIC SOLVENT, AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER, PLATINUM, PALLADIUM AND THE HALIDES THEREOF, AN AROMATIC SULFONYL HALIDE OF THE FORMULA:
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |