Patent US2997371A successfully refreshed from Google Patents.
US2997371A
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Recovering of bf3 from admixture with hydrocarbons
Assignee: Standard Oil Co
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Filing: 1958-12-01
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Granted: 1961-08-22
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Expires: 1978-12-01
Abstract
No abstract record available.
Inventors
- 👤 Francis T Wadsworth
- 👤 Leon M Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:26
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/06; B; B01; B01J; B01J27/00; B01J27/06; C07; C07C; C07C7/00; C07C7/12; C08; C08F; C08F120/00; C08F120/02; C08F120/42; C08F120/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR RECOVERING BF3 FROM ADMIXTURE WITH HYDROCARBON GASES, WHICH PROCESS COMPRISES CONTACTING A SOLID MASS CONSISTING ESSENTIALLY OF AN INERT PARTICULATE SUPPORT AND POLYACRYLONITRILE POSITIONED ON SAID SUPPORT WITH A FIRST GASEOUS MIXTURE CONSISTING ESSENTIALLY OF BF3 AND HYDROCARBONS, SAID CONTACTING BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 0*C. AND ABOUT 50*C. AND AT SUPER-ATMOSPHERIC PRESSURE, WHEREBY BF3 IS REMOVED FROM SAID FIRST MIXTURE ONTO SAID SOLID MASS, WITHDRAWING A SECOND GASEOUS MIXTURE OF REDUCED BF3 CONTENT FROM SAID CONTACTING ZONE AND HEATING SAID BF3-CONTAINING SOLID MASS TO A TEMPERATURE OF AT LEAST ABOUT 100*C. UNDER CONDITIONS TO RELEASE A BF3-RICH GASEOUS PRODUCT AND TO OBTAIN A SOLID MASS SUITABLE FOR CONTACTING ADDITIONAL AMOUNTS OF SAID FIRST GASEOUS MIXTURE.
Claim 2
Dependent Claim
122 words
A PROCESS FOR RECOVERING BF3 FROM ADMIXTURE WITH HYDROCARBON GASES, WHICH PROCESS COMPRISES CONTACTING A SOLID MASS CONSISTING ESSENTIALLY OF AN INERT PARTICULATE SUPPORT AND POLYACRYLONITRILE POSITIONED ON SAID SUPPORT WITH A FIRST GASEOUS MIXTURE CONSISTING ESSENTIALLY OF BF3 AND HYDROCARBONS, SAID CONTACTING BEING CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 0*C. AND ABOUT 50*C. AND AT SUPER-ATMOSPHERIC PRESSURE, WHEREBY BF3 IS REMOVED FROM SAID FIRST MIXTURE ONTO SAID SOLID MASS, WITHDRAWING A SECOND GASEOUS MIXTURE OF REDUCED BF3 CONTENT FROM SAID CONTACTING ZONE AND HEATING SAID BF3-CONTAINING SOLID MASS TO A TEMPERATURE OF AT LEAST ABOUT 100*C. UNDER CONDITIONS TO RELEASE A BF3-RICH GASEOUS PRODUCT AND TO OBTAIN A SOLID MASS SUITABLE FOR CONTACTING ADDITIONAL AMOUNTS OF SAID FIRST GASEOUS MIXTURE.
References Cited (Backward Citations)
US2400874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |