US2725402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective reduction of chlorobromophenols
Assignee: Dow Chemical Co
•
Filing: 1951-12-24
•
Granted: 1955-11-29
•
Expires: 1971-12-24
Abstract
No abstract record available.
Inventors
- 👤 Edgar C Britton
- 👤 Theodore R Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:17
CPC Classifications
C; C07; C07C; C07C37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD OF MAKING 2,6-DICHLOROPHENOL WHICH CONSISTS IN REACTING 4-BROMO-2,6-DICHLOROPHENOL WITH APPROXIMATELY ONE MOLECULAR EQUIVALENT OF HYDROGEN PER BROMINE ATOM IN THE MOLECULE IN THE PRESENCE OF A PALLADIUM CATALYST AND A HALOGEN ACID ACCEPTOR WHILE THE 4-BROMO2,6-DICHLOROPHENOL IS DISSOLVED IN A LIQUID REACTION MEDIUM.
Claim 2
Independent Claim
45 words
A METHOD OF MAKING 2,6-DICHLOROPHENOL WHICH CONSISTS IN REACTING 4-BROMO-2,6-DICHLOROPHENOL WITH APPROXIMATELY ONE MOLECULAR EQUIVALENT OF HYDROGEN PER BROMINE ATOM IN THE MOLECULE IN THE PRESENCE OF A PALLADIUM CATALYST AND A HALOGEN ACID ACCEPTOR WHILE THE 4-BROMO2,6-DICHLOROPHENOL IS DISSOLVED IN A LIQUID REACTION MEDIUM.
References Cited (Backward Citations)
US2025032A
Cited
US2560950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |