US2708209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for selective crystallization of 2, 5-dichlorophenol
Assignee: Olin Corp
•
Filing: 1953-10-29
•
Granted: 1955-05-10
•
Expires: 1973-10-29
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Nicolaisen
- 👤 Theodore M Jenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:30
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR THE PRODUCTION OF 2,5-DICHLOROPHENOL WHICH COMPRISES COOLING A MIXTURE OF ISOMERS OF DICHLOROPHENOL CONTAINING AT LEAST ABOUT 50 PER CENT OF 2,5-DICHLOROPHENOL TO A TEMPERATURE OF ABOUT 0 TO 5* C. UNTIL ABOUT ONE-THIRD TO ONE-HALF OF THE MIXTURE SEPARATES AS A SOLID PHASE AND RECOVERING THE SOLID PHASE AS A SOLID FRACTION SUBSTANTIALLY ENRICHED IN 2,5-DICHLOROPHENOL.
Claim 2
Dependent Claim
60 words
A PROCESS FOR THE PRODUCTION OF 2,5-DICHLOROPHENOL WHICH COMPRISES COOLING A MIXTURE OF ISOMERS OF DICHLOROPHENOL CONTAINING AT LEAST ABOUT 50 PER CENT OF 2,5-DICHLOROPHENOL TO A TEMPERATURE OF ABOUT 0 TO 5* C. UNTIL ABOUT ONE-THIRD TO ONE-HALF OF THE MIXTURE SEPARATES AS A SOLID PHASE AND RECOVERING THE SOLID PHASE AS A SOLID FRACTION SUBSTANTIALLY ENRICHED IN 2,5-DICHLOROPHENOL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |