Patent US3347779A successfully refreshed from Google Patents.
US3347779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of petroleum distillates by hydrodesulfurization and hydrogenation
Assignee: Shell USA Inc
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Filing: 1965-04-23
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Granted: 1967-10-17
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Groenendaal Willem
- 👤 Willem H Logman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10G; C10G2400/00; C10G2400/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM DISTILLATE HAVING AN IMPROVED SMOKE POINT COMPRISING THE SEQUENTIAL STEPS: (A) PARTIALLY HYDRODESULFURIZING A PETROLEUM DISTILLATE FRACTION HAVING A SMOKE POINT LOWER THAN DESIRED; (B) FRACTIONATING THE PARTIALY DESULFURIZED PETROLEUM DISTILLATE INTO TWO FRACTIONS OF DIFFERENT BOILING RANGES, BOTH OF WHICH HAVE ATMOSPHERIC BOILING RANGES AT LEAST AS HIGH AS THE BOILING RANGE OF KEROSENE, AND AT LEAST ONE OF WHICH BOILS SUBSTANTIALLY WITHIN THE KEROSENE BOILING RANGE; (C) HYDROGENATIVELY DEAROMATIZING SAID FRACTION BOILING SUBSTANTIALLY WITHIN THE KEROSENE BOILING RANGE; AND (D) BLENDING THE DEAROMATIZED KEROSENE BOILING RANGE FRACTION WITH THE REMAINING UN-DEAROMATIZED FRACTION HAVING AN ATMOSPHERE BOILING RANGE AT LEAST AS HIGH AS THE BOILING RANGE OF KEROSENE TO RECOVER A PETROLEUM DISTILLATE HAVING A HIGHER SMOKE POINT THAN THE FEED.
Claim 2
Dependent Claim
130 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM DISTILLATE HAVING AN IMPROVED SMOKE POINT COMPRISING THE SEQUENTIAL STEPS: (A) PARTIALLY HYDRODESULFURIZING A PETROLEUM DISTILLATE FRACTION HAVING A SMOKE POINT LOWER THAN DESIRED; (B) FRACTIONATING THE PARTIALY DESULFURIZED PETROLEUM DISTILLATE INTO TWO FRACTIONS OF DIFFERENT BOILING RANGES, BOTH OF WHICH HAVE ATMOSPHERIC BOILING RANGES AT LEAST AS HIGH AS THE BOILING RANGE OF KEROSENE, AND AT LEAST ONE OF WHICH BOILS SUBSTANTIALLY WITHIN THE KEROSENE BOILING RANGE; (C) HYDROGENATIVELY DEAROMATIZING SAID FRACTION BOILING SUBSTANTIALLY WITHIN THE KEROSENE BOILING RANGE; AND (D) BLENDING THE DEAROMATIZED KEROSENE BOILING RANGE FRACTION WITH THE REMAINING UN-DEAROMATIZED FRACTION HAVING AN ATMOSPHERE BOILING RANGE AT LEAST AS HIGH AS THE BOILING RANGE OF KEROSENE TO RECOVER A PETROLEUM DISTILLATE HAVING A HIGHER SMOKE POINT THAN THE FEED.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |