Patent US3844957A successfully refreshed from Google Patents.
US3844957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant and fuel compositions
Assignee: Citgo Petroleum Corp
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Filing: 1971-07-30
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Granted: 1974-10-29
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Expires: 1991-07-30
Abstract
Abstract Hydrocarbyl acid phosphate salts of ditetrahydropyrimidines and petroleum hydrocarbon compositions containing the same. The salts are formed by neutralizing with a hydrocarbyl acid orthophosphate at least 25 percent of the basic nitrogens of the ditetrahydropyrimidine. Petroleum hydrocarbon compositions containing these salts exhibit desirable properties such as enhanced corrosion resistance and improved detergency. Gasoline compositions containing the salts are also characterized by improved carburetor anti-icing characteristics.
Inventors
- 👤 F Robinson
- 👤 M Rakow
- 👤 P Kerschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2633; C10L1/2658; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
A NORMALLY LIQUID PETROLEUM HYDROCARBON COMPOSITION COMPRISING A MAJOR PROPORTION OF A NORMALLY LIQUID PETROLEUM HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF GASOLINE, DIESEL FUEL, JET FUEL, BURNER FUEL, AND LUBRICATING OIL AND ABOUT 1 TO 250 POUNDS PER THOUSAND BARRELS OF A HYDROCARBYL ACID ORTHOPHOSPHATE SALT OF A DITETRAHYDROPYRIMIDINE HAVING THE FORMULA
Claim 2
Dependent Claim
53 words
A NORMALLY LIQUID PETROLEUM HYDROCARBON COMPOSITION COMPRISING A MAJOR PROPORTION OF A NORMALLY LIQUID PETROLEUM HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF GASOLINE, DIESEL FUEL, JET FUEL, BURNER FUEL, AND LUBRICATING OIL AND ABOUT 1 TO 250 POUNDS PER THOUSAND BARRELS OF A HYDROCARBYL ACID ORTHOPHOSPHATE SALT OF A DITETRAHYDROPYRIMIDINE HAVING THE FORMULA
Claim 3
Dependent Claim
30 words
A gasoline composition comprising a major proportion of gasoline and about 3 to 100 pounds per thousand barrels of a hydrocarbyl acid orthophosphate salt of a ditetrahydropyrimidine having the formula
Claim 4
Dependent Claim
30 words
A gasoline composition comprising a major proportion of gasoline and about 3 to 100 pounds per thousand barrels of a hydrocarbyl acid orthophosphate salt of a ditetrahydropyrimidine having the formula
Claim 5
Dependent Claim
30 words
A gasoline composition comprising a major proportion of gasoline and about 3 to 100 pounds per thousand barrels of a hydrocarbyl acid orthophosphate salt of a ditetrahydropyrimidine having the formula
Claim 6
Dependent Claim
30 words
A gasoline composition comprising a major proportion of gasoline and about 3 to 100 pounds per thousand barrels of a hydrocarbyl acid orthophosphate salt of a ditetrahydropyrimidine having the formula
References Cited (Backward Citations)
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |