Patent US3679675A successfully refreshed from Google Patents.
US3679675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanines
Assignee: Sandoz AG
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Filing: 1970-03-30
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Granted: 1972-07-25
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Expires: 1990-03-30
Abstract
Abstract Dyes of the formula WHEREIN PC is the radical of a phthalocyanine, R1 and R2 are each H or a hydrocarbon radical or, together with N, a hetero ring, R3 and R4 are each H or (substituted) alkyl or, together with A and both N atoms, a hetero ring, R5 is H or (substituted) alkyl, X is a fiber-reactive radical M IS 1 TO 3, N IS 1 TO 3, P IS 1 OR 2, R IS 1 TO 5, THE SUM M+N+P IS 4 OR 5, ARE ESPECIALLY GOOD FOR PRINTING CELLULOSIC AND POLYAMIDE FIBERS.
Inventors
- 👤 Hans Von Tobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:00
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/016; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
Reactive phthalocyanine dye according to claim 1 wherein: PC is a radical of a copper or a nickel phthalocyanine; R is a hydrogen atom, methyl, ethyl or halo; R1 is a hydrogen atom, methyl, ethyl or hydroxyethyl; R5 is a hydrogen atom or methyl; p is 1; and the HO3S-group on the phenylene ring is ortho to the -NH-CO-substituent thereon.
Claim 2
Dependent Claim
43 words
Reactive phthalocyanine dye according to claim 2 wherein PC is a copper phthalocyanine radical; R1 is a hydrogen atom; R5 is metHyl; each Hal is, independently, fluoro, chloro or bromo; and the HO3S-group on the phenylene ring is para to the -NH-SO2-substituent thereon.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |