US2582192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesel fuel oil
Assignee: California Research LLC
•
Filing: 1948-07-13
•
Granted: 1952-01-08
•
Expires: 1968-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr George H Denison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:18
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AN IMPROVED DIESEL FUEL OIL CONTAINING ESSENTIALLY A MAJOR PROTION OF A DIESEL FUEL OIL HAVING A SUBSTANTIAL GUM-DEPOSITING CHARACTERISTIC AND A MINOR PORTION SUFFICIENT TO INHIBIT FORMATION OF GUM OF REDUCED PETROLEUM NITROGEN BASES COMPRISING A HOMOLOGOUS MIXTURE OF HETEROCYCLIC SECONDARY AMINES HAVING A BASIC DISSOCIATION CONSTANT HIGHER THAN 1.0X10-4 PREPARED BY EXTRACTING A CRUDE PETROLEUM OIL FRACTION CONTAINING NITROGEN BASES WITH A DILUTE MINERAL ACID TO FORM WATER-SOLUBLE SALTS OF MIXED NITROGEN BASES, SEPARATING THE SALTS FROM THE PETROLEUM OIL FRACTION, NEUTRALIZING THE SALTS TO CONVERT THEM TO CRUDE NITROGEN BASES, HYDROGENATING THE BASES AT AN ELEVATED TEMPERATURE AND PRESSURE IN THE PRESENCE OF A SULF-ACTIVE HYDROGENATION CATALYST TO FORM REDUCED PETROLEUM NITROGEN BASES.
Claim 2
Dependent Claim
116 words
AN IMPROVED DIESEL FUEL OIL CONTAINING ESSENTIALLY A MAJOR PROTION OF A DIESEL FUEL OIL HAVING A SUBSTANTIAL GUM-DEPOSITING CHARACTERISTIC AND A MINOR PORTION SUFFICIENT TO INHIBIT FORMATION OF GUM OF REDUCED PETROLEUM NITROGEN BASES COMPRISING A HOMOLOGOUS MIXTURE OF HETEROCYCLIC SECONDARY AMINES HAVING A BASIC DISSOCIATION CONSTANT HIGHER THAN 1.0X10-4 PREPARED BY EXTRACTING A CRUDE PETROLEUM OIL FRACTION CONTAINING NITROGEN BASES WITH A DILUTE MINERAL ACID TO FORM WATER-SOLUBLE SALTS OF MIXED NITROGEN BASES, SEPARATING THE SALTS FROM THE PETROLEUM OIL FRACTION, NEUTRALIZING THE SALTS TO CONVERT THEM TO CRUDE NITROGEN BASES, HYDROGENATING THE BASES AT AN ELEVATED TEMPERATURE AND PRESSURE IN THE PRESENCE OF A SULF-ACTIVE HYDROGENATION CATALYST TO FORM REDUCED PETROLEUM NITROGEN BASES.
References Cited (Backward Citations)
US2110078A
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US2302655A
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US2317968A
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US2363012A
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US2456569A
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US2521698A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |