US3135680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of refining diesel fuel with nitrogen dioxide
Assignee: Pure Oil Co
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Filing: 1961-09-11
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Granted: 1964-06-02
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Roger L Weichman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:04
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G27/12; C10G53/00; C10G53/02; C10G53/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A METHOD OF PRODUCING A DIESEL FUEL OF IMPROVED CETANE NUMBER WHICH CONSISTS IN CONTACTING A PETROLEUM FRACTION OF THE DIESEL-FUEL BOILING RANGE, WHICH HAS BEEN SUBJECTED TO PREVIOUS CHEMICAL TREATMENT, WITH NITROGEN DIOXIDE AS THE SOLE OXIDANT AT ABOUT 0*-40*C., AND WASHING THE TREATED PRODUCT WITH SUFFICIENT WASHING AGENT FROM THE GROUP CONSISTING OF WATER AND AQUEOUS ALKALI SOLUTION TO REMOVE SUBSTANTIALLY ALL WATER-SOLUBLE PRODUCTS, THE FINAL WASHING BEING WITH WATER.
Claim 2
Independent Claim
72 words
A METHOD OF PRODUCING A DIESEL FUEL OF IMPROVED CETANE NUMBER WHICH CONSISTS IN CONTACTING A PETROLEUM FRACTION OF THE DIESEL-FUEL BOILING RANGE, WHICH HAS BEEN SUBJECTED TO PREVIOUS CHEMICAL TREATMENT, WITH NITROGEN DIOXIDE AS THE SOLE OXIDANT AT ABOUT 0*-40*C., AND WASHING THE TREATED PRODUCT WITH SUFFICIENT WASHING AGENT FROM THE GROUP CONSISTING OF WATER AND AQUEOUS ALKALI SOLUTION TO REMOVE SUBSTANTIALLY ALL WATER-SOLUBLE PRODUCTS, THE FINAL WASHING BEING WITH WATER.
Claim 3
Dependent Claim
9 words
A FUEL OIL PRODUCED IN ACCORDANCE WITH CLAIM 1.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |