Patent US3158928A successfully refreshed from Google Patents.
Patent US2701267A successfully refreshed from Google Patents.
US2701267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resins
Assignee: —
•
Filing: —
•
Granted: 1955-02-01
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Expires: 1972-02-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:23
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C10G1/10; C10G2400/00; C10G2400/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A PROCESS FOR THE RECOVERY OF BENZENE AND OTHER HYDROCARBONS FROM OILS CONTAINING BENZENE CONTAMINATED WITH UNSATURATED HYDROCARBONS AND SULFUR COMPOUNDS, A PORTION OF THE CONTAMINANTS BEING POLYMERIZABLE WHEN THE OIL IS HEATED TO FORM RESINOUS, HIGHER BOILING SUBSTANCES, SAID PROCESS COMPRISING THE STEPS OF HEATING SAID OIL IN THE LIQUID PHASE AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE ABOVE 150* C. AND BELOW THE CRACKING TEMPERATURE OF SUBSTANTIALLY ALL OF THE HIGHER BOILING SUBSTANCES FORMED IN THE HEATING TREATMENT, SAID HEATING BEING CONTINUED UNTIL THE RESIN-FORMING CONTAMINANTS ARE CONVERTED INTO RESINOUS COMPOUNDS OF HIGHER BOILING POINT THAN BENZENE. THEREAFTER VAPORIZING BENZENE AND HOMOLOGUES, AND OTHER LOWER BOILING CONSTITUENTS FROM THE OIL, WHILE THE POLYMERISATES FORMED STILL REMAIN IN THE LIQUID PHASE, AND REACTING THE VAPORS OBTAINED WITH HYDROGEN AT AN ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE IN THE PRESENCE OF A CATALYST FOR HYDROGENATING UNSATURATED HYDROCARBONS AND SULFUR COMPOUNDS CONTAINED IN THE VAPORS BEING TREATED AND THEREAFTER SEPARATING BENZENE AND OTHER HYDROCARBONS FROM THE REACTION GASES AND CATALYST.
Claim 2
Dependent Claim
168 words
A PROCESS FOR THE RECOVERY OF BENZENE AND OTHER HYDROCARBONS FROM OILS CONTAINING BENZENE CONTAMINATED WITH UNSATURATED HYDROCARBONS AND SULFUR COMPOUNDS, A PORTION OF THE CONTAMINANTS BEING POLYMERIZABLE WHEN THE OIL IS HEATED TO FORM RESINOUS, HIGHER BOILING SUBSTANCES, SAID PROCESS COMPRISING THE STEPS OF HEATING SAID OIL IN THE LIQUID PHASE AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE ABOVE 150* C. AND BELOW THE CRACKING TEMPERATURE OF SUBSTANTIALLY ALL OF THE HIGHER BOILING SUBSTANCES FORMED IN THE HEATING TREATMENT, SAID HEATING BEING CONTINUED UNTIL THE RESIN-FORMING CONTAMINANTS ARE CONVERTED INTO RESINOUS COMPOUNDS OF HIGHER BOILING POINT THAN BENZENE. THEREAFTER VAPORIZING BENZENE AND HOMOLOGUES, AND OTHER LOWER BOILING CONSTITUENTS FROM THE OIL, WHILE THE POLYMERISATES FORMED STILL REMAIN IN THE LIQUID PHASE, AND REACTING THE VAPORS OBTAINED WITH HYDROGEN AT AN ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE IN THE PRESENCE OF A CATALYST FOR HYDROGENATING UNSATURATED HYDROCARBONS AND SULFUR COMPOUNDS CONTAINED IN THE VAPORS BEING TREATED AND THEREAFTER SEPARATING BENZENE AND OTHER HYDROCARBONS FROM THE REACTION GASES AND CATALYST.
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) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |