Colored petroleum distillate
Abstract
Abstract A PETROLEUM DISTILLATE IS IMPARTED WITH A DISTINCT COLORIZATION BY A LIQUID AZO DYE COMPOSITION SOLUBLE IN THE DISTILLATE. THE LIQUID AZO DYE COMPOSITION IS CHARACTERIZED IN THAT IT (A) HAS A COLOR VALUE WHICH IS AT LEAST ABOUT FORTY PERCENT OF THE COLOR VALUE OF A COMPARABLE SOLID DYE; (B) EXHIBITS PERMANENTLY HOMOGENEOUS LIQUIDITY; (C) IS CAPABLE OF COMPLETE AND SUBSTANTIALLY INSTANTANEOUS SOLUBILITY IN PETROLEUM DISTILLATES; AND (D) ESSENTIALLY CONSISTS OF BETWEEN ABOUT 50-75% BY WEIGHT OF A MIXTURE OF AZO DYES CONTAINING C5-C12 ALKYL BETA-NAPHTHOLS OR P-C5-C12 ALKYL PHENOL IN THE DYE MOLECULE AND ABOUT BETWEEN 50-25% BY WEIGHT OF A LIQUID ORGANIC VISCOSITY DEPRESSANT COMPATIBLE WITH THE AZO DYES.
Inventors
- 👤 Richard B Orelup
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |