US4450273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
NN' Para methoxy benzyl perylene-3,4,9,10-tetracarboxylic acid diimide
Assignee: BASF SE
•
Filing: 1982-01-06
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Granted: 1984-05-22
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Expires: 2002-01-06
Abstract
Abstract A perylene-3,4,9,10-tetracarboxylic acid diimide of the formula ##STR1## gives black colorations with excellent lightfastness and weathering fastness, in polyethylene, PVC, surface coatings, inks and aqueous dye formulations.
Inventors
- 👤 Fritz Graser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:01
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A perylene-3,4,9,10-tetracarboxylic diimide of the formula ##STR3##
Claim 2
Dependent Claim
7 words
A perylene-3,4,9,10-tetracarboxylic diimide of the formula ##STR3##
References Cited (Backward Citations)
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CH372163A
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US3022299A
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DE1130099B
Cited
FR2111823A1
Cited
GB1523475A
Cited
GB1537358A
Cited
US4262851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |