US2643942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel composition containing nu, nu'-dimethyl phenylene diamine to prevent knocking
Assignee: California Research LLC
•
Filing: 1949-09-19
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Granted: 1953-06-30
•
Expires: 1969-09-19
Abstract
No abstract record available.
Inventors
- 👤 Maurice R Barusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/02; C10L1/023; C10L1/18; C10L1/182; C10L1/1822; C10L1/1824; C10L1/185; C10L1/1857; C10L1/22; C10L1/222; C10L1/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A LIGHT-STABLE FUEL COMPRISING A MAJOR PORTION OF HYDROCARBONS BOILING IN THE GASOLINE BOILING RANGE, A MINOR PORTION ABOVE 0.1% OF N,N''DIMETHYL-P-PHENYLENE DIAMINE SUFFICIENT SUBSTANTIALLY TO INCREASE THE OCTANE RATING OF SAID HYDROCARBONS, AND A MINOR PORTION OF 2-10% OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS CONTAINING 2 THROUGH 4 CARBON ATOMS PER MOLECULE AND KETONES CONTAINING 3 THROUGH 8 CARBON ATOMS PER MOLECULE SUFFICIENT SUBSTANTIALLY TO PREVENT FORMATION OF HAZE FROM SAID PHENYLENE DIAMINE IN SAID HYDROCARBONS UPON EXPOSURE TO DAYLIGHT.
Claim 2
Dependent Claim
87 words
A LIGHT-STABLE FUEL COMPRISING A MAJOR PORTION OF HYDROCARBONS BOILING IN THE GASOLINE BOILING RANGE, A MINOR PORTION ABOVE 0.1% OF N,N''DIMETHYL-P-PHENYLENE DIAMINE SUFFICIENT SUBSTANTIALLY TO INCREASE THE OCTANE RATING OF SAID HYDROCARBONS, AND A MINOR PORTION OF 2-10% OF AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS CONTAINING 2 THROUGH 4 CARBON ATOMS PER MOLECULE AND KETONES CONTAINING 3 THROUGH 8 CARBON ATOMS PER MOLECULE SUFFICIENT SUBSTANTIALLY TO PREVENT FORMATION OF HAZE FROM SAID PHENYLENE DIAMINE IN SAID HYDROCARBONS UPON EXPOSURE TO DAYLIGHT.
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |