Patent US2499515A successfully refreshed from Google Patents.
US2499515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aromatic hydrocarbons
Assignee: Standard Oil Co
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Filing: 1949-06-29
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Granted: 1950-03-07
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Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:30
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR THE OXIDATION OF A LOW BOILING AROMATIC HYDROCARBON WHICH COMPRISES PASSING AN OXYGEN-CONTAINING GAS INTO A LIQUID MIXTURE COMPRISING A LOW BOILING AROMATIC HYDROCARBON, HF AND BF3, THE CONCENTRATION OF HF IN SAID MIXTURE BEING BETWEEN ABOUT 10 AND ABOUT 60 PER CENT BY VOLUME AND THE CONCENTRATION OF BF3 IN SAID MIXTURE BEING SUFFICIENT TO EXERT A PARTIAL PRESSURE BETWEEN ABOUT 5 AND ABOUT 300 P.S.I.G., SUBJECTING SAID LIQUID MIXTURE AND SAID OXYGENCONTAINING GAS TO A TEMPERATURE BETWEEN ABOUT 40 AND ABOUT 400*F. AND A TOTAL PRESSURE BETWEEN ABOUT 100 AND ABOUT 2500 P.S.I.G. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT PARTIAL OXIDATION OF THE HYDROCARBON CHARGING STOCK AND THE FORMATION OF A COMPLEX WHICH IS RESISTANT TO OXIDATION AND DECOMPOSING SAID COMPLEX TO LIBERATE HYDROCARBON OXIDATION PRODUCT THEREFROM.
Claim 2
Dependent Claim
134 words
A PROCESS FOR THE OXIDATION OF A LOW BOILING AROMATIC HYDROCARBON WHICH COMPRISES PASSING AN OXYGEN-CONTAINING GAS INTO A LIQUID MIXTURE COMPRISING A LOW BOILING AROMATIC HYDROCARBON, HF AND BF3, THE CONCENTRATION OF HF IN SAID MIXTURE BEING BETWEEN ABOUT 10 AND ABOUT 60 PER CENT BY VOLUME AND THE CONCENTRATION OF BF3 IN SAID MIXTURE BEING SUFFICIENT TO EXERT A PARTIAL PRESSURE BETWEEN ABOUT 5 AND ABOUT 300 P.S.I.G., SUBJECTING SAID LIQUID MIXTURE AND SAID OXYGENCONTAINING GAS TO A TEMPERATURE BETWEEN ABOUT 40 AND ABOUT 400*F. AND A TOTAL PRESSURE BETWEEN ABOUT 100 AND ABOUT 2500 P.S.I.G. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT PARTIAL OXIDATION OF THE HYDROCARBON CHARGING STOCK AND THE FORMATION OF A COMPLEX WHICH IS RESISTANT TO OXIDATION AND DECOMPOSING SAID COMPLEX TO LIBERATE HYDROCARBON OXIDATION PRODUCT THEREFROM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |