US3173919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chlorination of dichloro methylpyridines to trichloromethylpyridines
Assignee: Dow Chemical Co
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Filing: 1963-02-18
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Granted: 1965-03-16
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Johnston Howard
- 👤 Frederick H Norton
- 👤 Mary S Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:57
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR PREFERENTIALLY CONVERTING A COMPOSITION COMPRISING A DICHLOROMETHYLPYRIDINE COMPOUND HAVING AT LEAST ONE RING CHLORINE SUBSTITUENT TO A TRICHLOROMETHYLPYRIDINE COMPOUND HAVING AT LEAST ONE RING CHLORINE SUBSTITUENT WHICH COMPRISES INTIMATELY CONTACTING SAID DICHLOROMETHYLPYRIDINE COMPOUND WITH EXCESS GASEOUS CHLORINE AT TEMPERATURES IN THE RANGE OF FROM ABOUT 90* C. TO ABOUT 160*C. IN THE PRESENCE OF A PEROXIDE CATALYST, AND WHEREIN THE PROCESS IF CARRIED OUT IN THE ABSENCE OF ADDED WATER.
Claim 2
Dependent Claim
73 words
A PROCESS FOR PREFERENTIALLY CONVERTING A COMPOSITION COMPRISING A DICHLOROMETHYLPYRIDINE COMPOUND HAVING AT LEAST ONE RING CHLORINE SUBSTITUENT TO A TRICHLOROMETHYLPYRIDINE COMPOUND HAVING AT LEAST ONE RING CHLORINE SUBSTITUENT WHICH COMPRISES INTIMATELY CONTACTING SAID DICHLOROMETHYLPYRIDINE COMPOUND WITH EXCESS GASEOUS CHLORINE AT TEMPERATURES IN THE RANGE OF FROM ABOUT 90* C. TO ABOUT 160*C. IN THE PRESENCE OF A PEROXIDE CATALYST, AND WHEREIN THE PROCESS IF CARRIED OUT IN THE ABSENCE OF ADDED WATER.
References Cited (Backward Citations)
US2679453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |