US2600004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent optical bleaching agents
Assignee: EIDP Inc
•
Filing: 1951-06-18
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Granted: 1952-06-10
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Expires: 1971-06-18
Abstract
No abstract record available.
Inventors
- 👤 Krahler Stanley Earl
- 👤 Terrace Holly Oak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4,4'' -BIS(3- METHOXY -2- NAPHTHOYLAMINO) -STILBENE -2,2'' -DISULFONIC ACID AND ITS WATER-SOLUBLE SALTS.
Claim 2
Dependent Claim
21 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4,4'' -BIS(3- METHOXY -2- NAPHTHOYLAMINO) -STILBENE -2,2'' -DISULFONIC ACID AND ITS WATER-SOLUBLE SALTS.
Claim 3
Dependent Claim
34 words
A FLUORESCENCE AGENT FOR CELLULOSIC FIBER COMPRISING AN ADMIXTURE OF ABOUT 90 TO 50 PARTS BY WEIGHT OF 4,4'' -BIS-(2,4-DIMETHOXY-BENZOYLAMINO)STILBENE-2,2'' -DI(SODIUM-SULFONATE) AND ABOUT 10 TO 50 PARTS BY WEIGHT OF 4,4''-BIS(3-METHOXY-2NAPHTHOYLAMINO) -STILBENE -2,2'' -DI(SODIUM-SULFONATE).
Claim 4
Dependent Claim
34 words
A FLUORESCENCE AGENT FOR CELLULOSIC FIBER COMPRISING AN ADMIXTURE OF ABOUT 90 TO 50 PARTS BY WEIGHT OF 4,4'' -BIS-(2,4-DIMETHOXY-BENZOYLAMINO)STILBENE-2,2'' -DI(SODIUM-SULFONATE) AND ABOUT 10 TO 50 PARTS BY WEIGHT OF 4,4''-BIS(3-METHOXY-2NAPHTHOYLAMINO) -STILBENE -2,2'' -DI(SODIUM-SULFONATE).
References Cited (Backward Citations)
US2341009A
Cited
US2468431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |