Patent US2628991A successfully refreshed from Google Patents.
US2628991A
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US
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Removal of boron fluoride from reactive hydrocarbons
Assignee: Standard Oil Development Co
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Filing: 1949-09-14
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Granted: 1953-02-17
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Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Helmuth G Schneider
- 👤 William C Van Siclen
- 👤 Jr Paul W Brakeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:54
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C01; C01B; C01B35/00; C01B35/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF REMOVING CATALYTIC BORON FLUORIDE FROM A GASEOUS MIXTURE CONTAINING ISOBUTYLENE BEFORE THE ISOBUTYLENE HAS TIME TO FORM A SUBSTANTIAL AMOUNT OF POLYMER, WHICH COMPRISESS DISPERSING INTO A STREAM OF SAID GASEOUS MIXTURE A C2 TO C6 DIALKYL ETHER IN NO MORE THAN A SLIGHT EXCESS NECESSARY TO FORM A COMPLEX WITH THE BF3 IN SAID GASEOUS MIXTURE SO THAT VAPORS OF THE ETHER IMMEDIATELY FORM THE COMPLEX, SCRUBBING THE RESULTING GASEOUS MIXTURE CONTAINING THE COMPLEX DISPERSED THEREIN WITH A HYDROCARBON THAT REMAINS INERT AND LIQUID UNDER THE OPERATION CONDITIONS TO FREE THE ISOBUTYLENE GAS OF COMPLEX AND ETHER AND ANY SLIGHT RESIDUAL EXCESS ETHER, SEPARATING THE THUS SCRUBBED ISOBUTYLENE GAS FROM THE RESULTING LIQUID HYDROCAR-
Claim 2
Independent Claim
118 words
THE METHOD OF REMOVING CATALYTIC BORON FLUORIDE FROM A GASEOUS MIXTURE CONTAINING ISOBUTYLENE BEFORE THE ISOBUTYLENE HAS TIME TO FORM A SUBSTANTIAL AMOUNT OF POLYMER, WHICH COMPRISESS DISPERSING INTO A STREAM OF SAID GASEOUS MIXTURE A C2 TO C6 DIALKYL ETHER IN NO MORE THAN A SLIGHT EXCESS NECESSARY TO FORM A COMPLEX WITH THE BF3 IN SAID GASEOUS MIXTURE SO THAT VAPORS OF THE ETHER IMMEDIATELY FORM THE COMPLEX, SCRUBBING THE RESULTING GASEOUS MIXTURE CONTAINING THE COMPLEX DISPERSED THEREIN WITH A HYDROCARBON THAT REMAINS INERT AND LIQUID UNDER THE OPERATION CONDITIONS TO FREE THE ISOBUTYLENE GAS OF COMPLEX AND ETHER AND ANY SLIGHT RESIDUAL EXCESS ETHER, SEPARATING THE THUS SCRUBBED ISOBUTYLENE GAS FROM THE RESULTING LIQUID HYDROCAR-
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |