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Patent US3129699A successfully refreshed from Google Patents.
US3129699A
Expired / Lapsed
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Diesel fuel containing a heterocyclic polyamine salt
Assignee: Pure Oil Co
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Filing: 1961-11-24
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Granted: 1964-04-21
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Allen F Millikan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:46
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C10L1/22; C10L1/232; C10L1/24; C10L1/2431; C10L1/2437; C10L1/26; C10L1/2633; C10L1/2658; C10L1/2691
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN IMPROVED METHOD OF OPERATING A DIESEL ENGINE WHICH COMPRISES FEEDING TO SAID DIESEL ENGINE A FUEL COMPOSITION COMPRISING A MAJOR PORTION OF A PETROLEUM DIESEL FUEL OIL AND AT LEAST ONE OIL-SOLUBLE HETEROCYCLIC POLYAMINE SALT OF AN ORGANIC ACID IN AN AMOUNT SUFFICIENT TO INCREASE THE CETANE NUMBER OF SAID OIL, WHERE THE HETEROCYCLIC POLYAMINE IS SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYL ENETRIAMINE, CYCLOTRIMETHYLENETRIAMINES, PIPERAZINE, ALKYL-SUBSTITUTED PIPERAZINE, AND ALKYLISOMELAMINES.
Claim 2
Dependent Claim
71 words
AN IMPROVED METHOD OF OPERATING A DIESEL ENGINE WHICH COMPRISES FEEDING TO SAID DIESEL ENGINE A FUEL COMPOSITION COMPRISING A MAJOR PORTION OF A PETROLEUM DIESEL FUEL OIL AND AT LEAST ONE OIL-SOLUBLE HETEROCYCLIC POLYAMINE SALT OF AN ORGANIC ACID IN AN AMOUNT SUFFICIENT TO INCREASE THE CETANE NUMBER OF SAID OIL, WHERE THE HETEROCYCLIC POLYAMINE IS SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYL ENETRIAMINE, CYCLOTRIMETHYLENETRIAMINES, PIPERAZINE, ALKYL-SUBSTITUTED PIPERAZINE, AND ALKYLISOMELAMINES.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |