US2641538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing discoloration of fuel oils
Assignee: Universal Oil Products Co
•
Filing: 1950-04-06
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Granted: 1953-06-09
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Expires: 1970-04-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/24; C10L1/2443; C10L1/245; C10L1/228; C10L1/2283; C10L1/232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A FUEL OIL HEAVIER THAN GASOLINE CONTAINING, AS A RETARDER OF DISCOLORATION, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A BENZALAMINOALKANOL AND A FURFURALIMINALKANOL, THE ALKANOL GROUP OF SAID COMPOUND CONTAINING FROM ABOUT 2 TO ABOUT 12 CARBON ATOMS.
Claim 2
Dependent Claim
40 words
A FUEL OIL HEAVIER THAN GASOLINE CONTAINING, AS A RETARDER OF DISCOLORATION, A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A BENZALAMINOALKANOL AND A FURFURALIMINALKANOL, THE ALKANOL GROUP OF SAID COMPOUND CONTAINING FROM ABOUT 2 TO ABOUT 12 CARBON ATOMS.
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |