US2508221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ethylidene fluoride from gas mixtures containing same
Assignee: Honeywell International Inc
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Filing: 1946-10-26
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Granted: 1950-05-16
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Expires: 1966-10-26
Abstract
No abstract record available.
Inventors
- 👤 John D Calfee
- 👤 Francis H Bratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:29
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE PROCESS WHICH COMPRISES CONTACTING A GAS MIXTURE CONTAINING ETHYLIDENE FLUORIDE AND METHYL CHLORIDE WITH A PREDOMINANTLY NONAROMATIC LIQUID PETROLEUM HYDROCARBON OIL BOILING WITHIN THE RANGE OF 150-300*C. WHILE MAINTAINING SAID HYDROCARBON AT TEMPERATURE WITHIN THE RANGE OF MINUS 20*C. TO PLUS 100*C. TO THEREBY EXTRACT METHYL CHLORIDE FROM SAID GAS MIXTURE AND FORM AN OFF-GAS ENRICHED IN ETHYLIDENE FLUORIDE, AND RECOVERING METHYL CHLORIDE FROM SAID LIQUID HYDROCARBON.
Claim 2
Dependent Claim
68 words
THE PROCESS WHICH COMPRISES CONTACTING A GAS MIXTURE CONTAINING ETHYLIDENE FLUORIDE AND METHYL CHLORIDE WITH A PREDOMINANTLY NONAROMATIC LIQUID PETROLEUM HYDROCARBON OIL BOILING WITHIN THE RANGE OF 150-300*C. WHILE MAINTAINING SAID HYDROCARBON AT TEMPERATURE WITHIN THE RANGE OF MINUS 20*C. TO PLUS 100*C. TO THEREBY EXTRACT METHYL CHLORIDE FROM SAID GAS MIXTURE AND FORM AN OFF-GAS ENRICHED IN ETHYLIDENE FLUORIDE, AND RECOVERING METHYL CHLORIDE FROM SAID LIQUID HYDROCARBON.
References Cited (Backward Citations)
US2384449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |