US3853859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonfluorescent, green-yellow cationic dye
Assignee: EIDP Inc
•
Filing: 1973-05-14
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Granted: 1974-12-10
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Expires: 1993-05-14
Abstract
Abstract A nonfluorescent green-yellow cationic dye having the formula: WHEREIN X is one of a variety of anions.
Inventors
- 👤 F Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:51
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
8 words
A NONFLUORESCENT GREEN-YELLOW CATIONIC DYE OF THE DORMULA
Claim 2
Dependent Claim
8 words
A NONFLUORESCENT GREEN-YELLOW CATIONIC DYE OF THE DORMULA
Claim 3
Dependent Claim
12 words
A dye according to claim 1 wherein X is a chloride anion.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |