US2993893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of water-soluble complexes of thiazoline-rhodanine dyes
Assignee: EIDP Inc
•
Filing: 1959-04-16
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Granted: 1961-07-25
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Expires: 1979-04-16
Abstract
No abstract record available.
Inventors
- 👤 Hunt Heman Dowd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:52
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C09; C09B; C09B23/00; C09B23/10; C09B23/105; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR THE FORMATION OF WATER-SOLUBLE COMPLEXES OF WATER-INSOLUBLE MEROCYANINE DYES WHICH COMPRISES ADMIXING A MEROCYANINE DYE OF THE FORMULA.
Claim 2
Dependent Claim
21 words
A PROCESS FOR THE FORMATION OF WATER-SOLUBLE COMPLEXES OF WATER-INSOLUBLE MEROCYANINE DYES WHICH COMPRISES ADMIXING A MEROCYANINE DYE OF THE FORMULA.
References Cited (Backward Citations)
US2272163A
Cited
US2342546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |