US2683083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-alkyl-nu'-(p-hydroxyphenyl) ureas as antioxidants for petroleum hydrocarbon fuels
Assignee: Ethyl Corp
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Filing: 1952-07-26
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Granted: 1954-07-06
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Expires: 1972-07-26
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 00:40
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A NEW PETROLEUM HYDROCARBON FUEL COMPOSITION STABLE TO OXIDATION CONSISTING ESSENTIALLY OF GASOLINE, NORMALLY SUSCEPTIBLE TO DETERIORATION BY OXYGEN AND, IN AMOUNT SUFFICIENT TO PREVENT SUCH DETERIORATION, AN ANTIOXIDANT MATERIAL CONSISTING OF AN N''-(P-HYDROXYPHENYL) UREA SUBSTITUTED ON THE N-NITROGEN ATOM WITH A MEMBER SELECTED FROM A GROUP CONSISTING OF ACYCLIC AND CYCLIC SATURATED PARAFFIN RADICALS CONTAINING UP TO ABOUT 18 CARBON ATOMS.
Claim 2
Dependent Claim
62 words
A NEW PETROLEUM HYDROCARBON FUEL COMPOSITION STABLE TO OXIDATION CONSISTING ESSENTIALLY OF GASOLINE, NORMALLY SUSCEPTIBLE TO DETERIORATION BY OXYGEN AND, IN AMOUNT SUFFICIENT TO PREVENT SUCH DETERIORATION, AN ANTIOXIDANT MATERIAL CONSISTING OF AN N''-(P-HYDROXYPHENYL) UREA SUBSTITUTED ON THE N-NITROGEN ATOM WITH A MEMBER SELECTED FROM A GROUP CONSISTING OF ACYCLIC AND CYCLIC SATURATED PARAFFIN RADICALS CONTAINING UP TO ABOUT 18 CARBON ATOMS.
References Cited (Backward Citations)
US2266601A
Cited
US2477872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |