Patent US3277138A successfully refreshed from Google Patents.
US3277138A
Expired / Lapsed
US
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Method for the chlorination of aromatic isocyanates
Assignee: —
•
Filing: —
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Granted: 1966-10-04
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:02
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/14; C07C263/00; C07C263/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR THE PRODUCTION OF CHLORINATED AROMATIC ISOCYANATES CONSISTING ESSENTIALLY OF REACTING CHLORINE WITH AN AROMATIC ISOCYANATE AT A TEMPERATURE OF FROM ABOUT -20*C. TO ABOUT 150*C. IN A FIRST STEP TO PRODUCE AN AROMATIC ISOCYANATE HAVING CHLORINE AT A POSITION ORTHO TO THE -NCO GROUP ON THE ARYL NUCLEUS AND THEN CHLORINATING THE REACTION MIXTURE IN A SECOND SUBSEQUENT STEP AT A TEMPERATURE OF FROM ABOUT 210*C. TO ABOUT 250*C. TO PERCHLORINATE THE ARYL NUCLEUS IN THE PRESENCE OF FROM ABOUT 0.1 TO ABOUT 10% OF FECL3, FEBR3, FEI3, ALCL3, SBCL3, SB2S3, SBCL5, SNCL4 OR TICL4 AS CATALYSTS.
Claim 2
Dependent Claim
100 words
A PROCESS FOR THE PRODUCTION OF CHLORINATED AROMATIC ISOCYANATES CONSISTING ESSENTIALLY OF REACTING CHLORINE WITH AN AROMATIC ISOCYANATE AT A TEMPERATURE OF FROM ABOUT -20*C. TO ABOUT 150*C. IN A FIRST STEP TO PRODUCE AN AROMATIC ISOCYANATE HAVING CHLORINE AT A POSITION ORTHO TO THE -NCO GROUP ON THE ARYL NUCLEUS AND THEN CHLORINATING THE REACTION MIXTURE IN A SECOND SUBSEQUENT STEP AT A TEMPERATURE OF FROM ABOUT 210*C. TO ABOUT 250*C. TO PERCHLORINATE THE ARYL NUCLEUS IN THE PRESENCE OF FROM ABOUT 0.1 TO ABOUT 10% OF FECL3, FEBR3, FEI3, ALCL3, SBCL3, SB2S3, SBCL5, SNCL4 OR TICL4 AS CATALYSTS.
References Cited (Backward Citations)
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Cited
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US2945875A
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |