US3258500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fluorinating halohydro-carbons
Assignee: EIDP Inc
•
Filing: 1959-08-17
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Granted: 1966-06-28
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Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Frederic W Swamer
- 👤 Benjamin W Howk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02; C07C23/08; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; C07C17/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE PROCESS FOR FLUORINATING HALOHYDROCARBONS WHICH COMPRISES CONTACTING A VAPOR MIXTURE OF A HALOGENATED ALIPHATIC HYDROCARBON OF 1 TO 8 CARBON ATOMS IN WHICH ADJACENT CARBONS ARE LINKED SOLELY BY 1 TO 2 VAENCE BONDS AND IN WHICH THE HALOGEN ATOMS HAVE AN ATOMIC WEIGHT OF LESS THAN 80 AND INCLUDE AT LEAST ONE HALOGEN ATOM HAVING AN ATOMIC WEIGHT BETWEEN 35 AND 80 AND AT LEAST A STOICHIOMETRIC PROPROTION OF ANHYDROUS HYDROGEN FLUORIDE WITH A CATALYST WHICH CONSISTS ESSENTIALLY OF AN ACTIVATED ANHYDROUS CHROMIUM (111) OXIDE AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 150*C. TO ABOUT 700*C. SUCH THAT THE PRINCIPAL REACTION IS THE SUBSTITUTION OF FLUORINE FOR OTHER HALOGEN OF THE HALOGENATED HYDROCARBON, SEPARATING THE FLUORINATED COMPOUND FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
125 words
THE PROCESS FOR FLUORINATING HALOHYDROCARBONS WHICH COMPRISES CONTACTING A VAPOR MIXTURE OF A HALOGENATED ALIPHATIC HYDROCARBON OF 1 TO 8 CARBON ATOMS IN WHICH ADJACENT CARBONS ARE LINKED SOLELY BY 1 TO 2 VAENCE BONDS AND IN WHICH THE HALOGEN ATOMS HAVE AN ATOMIC WEIGHT OF LESS THAN 80 AND INCLUDE AT LEAST ONE HALOGEN ATOM HAVING AN ATOMIC WEIGHT BETWEEN 35 AND 80 AND AT LEAST A STOICHIOMETRIC PROPROTION OF ANHYDROUS HYDROGEN FLUORIDE WITH A CATALYST WHICH CONSISTS ESSENTIALLY OF AN ACTIVATED ANHYDROUS CHROMIUM (111) OXIDE AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 150*C. TO ABOUT 700*C. SUCH THAT THE PRINCIPAL REACTION IS THE SUBSTITUTION OF FLUORINE FOR OTHER HALOGEN OF THE HALOGENATED HYDROCARBON, SEPARATING THE FLUORINATED COMPOUND FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |