US3351670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of p-halotetrafluorophenol
Assignee: National Smelting Co Ltd
•
Filing: 1963-07-25
•
Granted: 1967-11-07
•
Expires: 1983-07-25
Abstract
No abstract record available.
Inventors
- 👤 Belf Leon Jerzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:03
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/24; C07C39/26; C07C39/27; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60; C07C37/00; C07C37/01; C07C37/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
A CHEMICAL COMPOUND OF FORMULA P-X-C6F4-OH WHERE X IS CHOSEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE.
Claim 2
Dependent Claim
19 words
A CHEMICAL COMPOUND OF FORMULA P-X-C6F4-OH WHERE X IS CHOSEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE.
Claim 3
Independent Claim
64 words
A METHOD FOR THE PREPARATION OF A COMPOUND OF FORMULA X-C6F4-OH WHERE X IS CHOSEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE COMPRISING THE STEPS OF MIXING A COMPOUND OF FORMULA C6F5X WHEREIN X HAS THE SAME MEANING AS IN THE PRECEDING FORMULA AND POTASSIUM HYDROXIDE IN TERTIARY BUTANOL SOLUTION AND HEATING THE RESULTING HOMOGENEOUS MIXTURE AT A TEMPERATURE UP TO REFLUX.
Claim 4
Independent Claim
64 words
A METHOD FOR THE PREPARATION OF A COMPOUND OF FORMULA X-C6F4-OH WHERE X IS CHOSEN FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE COMPRISING THE STEPS OF MIXING A COMPOUND OF FORMULA C6F5X WHEREIN X HAS THE SAME MEANING AS IN THE PRECEDING FORMULA AND POTASSIUM HYDROXIDE IN TERTIARY BUTANOL SOLUTION AND HEATING THE RESULTING HOMOGENEOUS MIXTURE AT A TEMPERATURE UP TO REFLUX.
References Cited (Backward Citations)
US1992154A
Cited
US2799713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |