US2494867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of fluorine from organic materials
Assignee: Phillips Petroleum Co
•
Filing: 1942-02-07
•
Granted: 1950-01-17
•
Expires: 1962-02-07
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:47
CPC Classifications
C; C10; C10G; C10G31/00; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C7/00; C07C7/005; C07C7/148; C07C9/00; C07C9/14; C07C9/16; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A PROCESS FOR THE CATALYTIC CONVERSION OF HYDROCARBONS IN THE PRESENCE OF A HYDROGEN FLUORIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES SEPARATING FROM EFFLUENTS OF SAID CONVERSION AT LEAST A PORTION OF THE USED LIQUID HYDROGEN FLUORIDE WHICH CONTAINS DISSOLVED FLUORIDE-CONTAINING ORGANIC IMPURITIES, SUBJECTING SAID PORTION TO FRACTIONAL DISTILLATION TO SEPARATE PURIFIED HYDROGEN FLUORIDE FROM LIQUID ORGANIC IMPURITIES AND RECOVERING SAID PURIFIED HYDROGEN FLUORIDE, SUBJECTING RESIDUAL LIQUID FLUORINE-CONTAINING ORGANIC IMPURITIES TO AN ELEVATED TEMPERATURE TO DECOMPOSE THE SAME, FORMING HYDROGEN FLUORIDE, AND RECOVERING HYDROGEN FLUORIDE SO FORMED.
Claim 2
Dependent Claim
87 words
IN A PROCESS FOR THE CATALYTIC CONVERSION OF HYDROCARBONS IN THE PRESENCE OF A HYDROGEN FLUORIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES SEPARATING FROM EFFLUENTS OF SAID CONVERSION AT LEAST A PORTION OF THE USED LIQUID HYDROGEN FLUORIDE WHICH CONTAINS DISSOLVED FLUORIDE-CONTAINING ORGANIC IMPURITIES, SUBJECTING SAID PORTION TO FRACTIONAL DISTILLATION TO SEPARATE PURIFIED HYDROGEN FLUORIDE FROM LIQUID ORGANIC IMPURITIES AND RECOVERING SAID PURIFIED HYDROGEN FLUORIDE, SUBJECTING RESIDUAL LIQUID FLUORINE-CONTAINING ORGANIC IMPURITIES TO AN ELEVATED TEMPERATURE TO DECOMPOSE THE SAME, FORMING HYDROGEN FLUORIDE, AND RECOVERING HYDROGEN FLUORIDE SO FORMED.
References Cited (Backward Citations)
US1220821A
Cited
US2013030A
Cited
US2275312A
Cited
US2288580A
Cited
US2267730A
Cited
US2320629A
Cited
US2388918A
Cited
US2436695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |