US2967815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utilization of low-temperature tars
Assignee: Alcoa Corp
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Filing: 1958-01-10
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Granted: 1961-01-10
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Expires: 1978-01-10
Abstract
No abstract record available.
Inventors
- 👤 Dell Manuel Benjamin
- 👤 Vernon M Stowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN THE UTILIZATION OF LOW-TEMPERATURE TARS TO PREPARE ELECTRODE-QUALITY COKE, REFINED HYDROCARBON LIQUIDS SUITABLE AS SOLVENTS AND OTHER VALUABLE PRODUCTS, THE METHOD COMPRISING DISTILLING LOW-TEMPERATURE TAR TO RECOVER PHENOLIC OIL; THERMALLY DECOMPOSING THE RESIDUE FROM SAID PHENOLIC OIL DISTILLATION AT A TEMPERATURE BETWEEN 375*C. AND 475*C. AND A PRESSURE BETWEEN ATMOSPHERIC AND 100 POUNDS PER SQUARE INCH TO CONVERT SAID RESIDUE INTO COKE, GASEOUS PRODUCTS, AND CONDENSIBLE OILS INCLUDING PHENOLIC OIL AND MIDDLE OIL, SAID CONDENSIBLE OILS BEING COMPRISED, IN PART, OF ORGANIC COMPOUNDS CONTAINING COMBINED HETEROATOMS; RECYCLING A PORTION OF CONDENSIBLE HYDROCARBONS IN ADMIXTURE WITH SAID RESIDUE IN AN AMOUNT BETWEEN 0.3 AND 3.0 TO 1 PRIOR TO SAID THERMAL DECOMPOSITION STEP; EXTRACTING PHENOLIC CONSTITUENTS FROM SAID FIRT-MENTIONED AND SECOND-MENTIONED PHENOLIC OILS; HYDROREFINING SAID MIDDLE OIL BY CATALYTIC TREATMENT WITH HYDROGEN AT A TEMPERATURE BETWEEN 425*C. AND 620*C., A PRESSURE BETWEEN 100 AND 1000 POUNDS PER SQUARE INCH AND A LIQUID HOURLY
Claim 2
Dependent Claim
153 words
IN THE UTILIZATION OF LOW-TEMPERATURE TARS TO PREPARE ELECTRODE-QUALITY COKE, REFINED HYDROCARBON LIQUIDS SUITABLE AS SOLVENTS AND OTHER VALUABLE PRODUCTS, THE METHOD COMPRISING DISTILLING LOW-TEMPERATURE TAR TO RECOVER PHENOLIC OIL; THERMALLY DECOMPOSING THE RESIDUE FROM SAID PHENOLIC OIL DISTILLATION AT A TEMPERATURE BETWEEN 375*C. AND 475*C. AND A PRESSURE BETWEEN ATMOSPHERIC AND 100 POUNDS PER SQUARE INCH TO CONVERT SAID RESIDUE INTO COKE, GASEOUS PRODUCTS, AND CONDENSIBLE OILS INCLUDING PHENOLIC OIL AND MIDDLE OIL, SAID CONDENSIBLE OILS BEING COMPRISED, IN PART, OF ORGANIC COMPOUNDS CONTAINING COMBINED HETEROATOMS; RECYCLING A PORTION OF CONDENSIBLE HYDROCARBONS IN ADMIXTURE WITH SAID RESIDUE IN AN AMOUNT BETWEEN 0.3 AND 3.0 TO 1 PRIOR TO SAID THERMAL DECOMPOSITION STEP; EXTRACTING PHENOLIC CONSTITUENTS FROM SAID FIRT-MENTIONED AND SECOND-MENTIONED PHENOLIC OILS; HYDROREFINING SAID MIDDLE OIL BY CATALYTIC TREATMENT WITH HYDROGEN AT A TEMPERATURE BETWEEN 425*C. AND 620*C., A PRESSURE BETWEEN 100 AND 1000 POUNDS PER SQUARE INCH AND A LIQUID HOURLY
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) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |