US2862980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the chloromethylating of monosubstituted aromatic hydrocarbons
Assignee: Perfogit SpA
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Filing: 1955-05-09
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Granted: 1958-12-02
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Muench Werner
- 👤 Notarbartolo Luigi
- 👤 Coen Cesare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:11
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C07; C07C; C07C17/00; C07C17/26; C07C17/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR CHLOROMETHYLATING AN AROMATIC HYDROCARBON CHOSEN FROM THE GROUP CONSISTING OF TOLUENE AND ETHYL BENZENE BY TREATING THE SAME WIITH HYDROCHLORC ACID AND FORMALDEHYDE IN THE PRESENCE OF A HYDRATE OF BORON TRIFLUORIDE WHEREBY TO DIRECT THE CHLOROMETHYLATION TOWARDS THE PRODUCTION OF PARA-SUBSTITUTED ISOMERS, WHEREIN THE CHLOROMETHYLATION IS CARRIED OUT AT A TEMPERATURE BETWEEN -10* AND +100*C. AND WHEREIN THE MOL RATIO OF BORON TRIFLUORIDE TO THE HYDROCARBON TO BE CHLOROMETHYLATED IS BETWEEN ABOUT 0.5 AND 0.9.
Claim 2
Dependent Claim
79 words
A PROCESS FOR CHLOROMETHYLATING AN AROMATIC HYDROCARBON CHOSEN FROM THE GROUP CONSISTING OF TOLUENE AND ETHYL BENZENE BY TREATING THE SAME WIITH HYDROCHLORC ACID AND FORMALDEHYDE IN THE PRESENCE OF A HYDRATE OF BORON TRIFLUORIDE WHEREBY TO DIRECT THE CHLOROMETHYLATION TOWARDS THE PRODUCTION OF PARA-SUBSTITUTED ISOMERS, WHEREIN THE CHLOROMETHYLATION IS CARRIED OUT AT A TEMPERATURE BETWEEN -10* AND +100*C. AND WHEREIN THE MOL RATIO OF BORON TRIFLUORIDE TO THE HYDROCARBON TO BE CHLOROMETHYLATED IS BETWEEN ABOUT 0.5 AND 0.9.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |