US2925333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored hydrocarbons
Assignee: Eastman Kodak Co
•
Filing: 1955-05-24
•
Granted: 1960-02-16
•
Expires: 1975-05-24
Abstract
No abstract record available.
Inventors
- 👤 John W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:00
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PETROLEUM DISTILLATE COLORED WITH A DYE COMPOUND SELECTED FROM THE DYE COMPOUNDS CONSISTING OF N-SEC-BUTYL-P-(4-NITROPHENYLAZO) ANILINE, N-ISOBUTYL-P-(4NITROPHENYLAZO) ANILINE, N-N-BUTYL-P-(4-NITROPHENYLAZO) ANILINE AND N-ETHYL-P-(4-NITROPHENYLAZO(-O-TOLUIDINE DISSOLVED THEREIN, SAID DYE COMPOUND BEING PRESENT IN THE PROPORTION OF ABOUT 1.50 MG. TO ABOUT 100 MG. PER GALLON OF SAID PETROLEUM DISTILLATE.
Claim 2
Dependent Claim
47 words
A PETROLEUM DISTILLATE COLORED WITH A DYE COMPOUND SELECTED FROM THE DYE COMPOUNDS CONSISTING OF N-SEC-BUTYL-P-(4-NITROPHENYLAZO) ANILINE, N-ISOBUTYL-P-(4NITROPHENYLAZO) ANILINE, N-N-BUTYL-P-(4-NITROPHENYLAZO) ANILINE AND N-ETHYL-P-(4-NITROPHENYLAZO(-O-TOLUIDINE DISSOLVED THEREIN, SAID DYE COMPOUND BEING PRESENT IN THE PROPORTION OF ABOUT 1.50 MG. TO ABOUT 100 MG. PER GALLON OF SAID PETROLEUM DISTILLATE.
References Cited (Backward Citations)
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Cited
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US2224904A
Cited
US2173053A
Cited
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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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |