US3286442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation of hydrogen fluoride from non-condensable diluents
Assignee: Hooker Chemical Corp
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Filing: 1964-05-27
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Granted: 1966-11-22
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Wylegala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A METHOD OF CONDENSING HYDROGEN FLUORIDE IN A NONCONDENSABLE GAS STREAM WHICH COMPRISES SCRUBBING A NONCONDENSABLE GAS STREAM CONTAINING HYDROGEN FLUORIDE BY CONTACTING IT WITH LIQUID HYDROGEN FLUORIDE, COOLING THE GAS STREAM BY SAID CONTACT WHILE VAPORIZING HYDROGEN FLUORIDE GAS FROM THE LIQUID HYDROGEN FLUORIDE WITH WHICH THE SAID GAS STREAM IS CONTACTED, COMBINING THE THUSVAPORIZED HYDROGEN FLUORIDE GAS WITH THE SAID GAS STREAM IN THE ZONE OF CONTACT WITH THE SAID GAS STREAM FLUORIDE, FRACTIONATING THE RESULTING MIXTURE OF GAS AND LIQUID, SEPARATING HIGH BOILING CONDENSATES THEREFROM, COMPRESSING THE RESULTING GAS MIXTURE FROM WHICH THE HIGH BOILING CONDENSATES HAVE BEEN REMOVED, REMOVING HEAT GENERATED IN COMPRESSING, AND SEPARATING LIQUIFIED HYDROGEN FLUORIDE FROM THE COMPRESSED GAS.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |