US3674783A
Expired / Lapsed
US
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Phthalocyanine compounds
Assignee: Sandoz AG
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Filing: 1969-06-16
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Granted: 1972-07-04
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Expires: 1989-06-16
Abstract
Abstract Watersoluble condensation products of 2 Moles of a compound or two different compounds of the formula WHEREIN PC stands for a metal-free or metal-containing phthalocyanine radical bearing two or three SO3H- and/or A for an organic bridge-member, each of R1 and R2 for hydrogen or lower (substituted) alkyl, each of X and Y for hydrogen or lower (hydroxy) alkyl, with 1 Mol of cyanuric halide, as dyes with good wash-off and build-up properties, especially good for printing and exhaustion dyeing.
Inventors
- 👤 Hans Von Tobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:39
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/082; C09B43/00; C09B43/12; C09B43/136; C09B43/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
A water-soluble phthalocyanine compound according to claim 1 of the formula
Claim 2
Dependent Claim
24 words
A water-soluble phthalocyanine compound according to claim 2 wherein each of PC'''' and PC'''''' is a radical of copper-containing phthalocyanine and Hal is chloro.
Claim 3
Dependent Claim
26 words
A water-soluble phthalocyanine compound according to claim 2 in which at least one of the bridge members, A1 and A2, is of one of the formulae
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |