US5319083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black peryene-3,4,9,10-tetracarboxylic diimides, their preparation and use
Assignee: Hoechst AG
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Filing: 1992-12-16
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Granted: 1994-06-07
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Expires: 2012-12-16
Abstract
Abstract The invention relates to perylene-3,4,9,10-tetracarboxylic diimides of the formula (I) ##STR1## in which R is a 3'- and/or 4'-methoxybenzyl radical, and their preparation and use as black pigments, inter alia in paint preparations, printing inks or for the dyeing of polymers.
Inventors
- 👤 Helmut Troster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:51
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/06; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C09; C09B; C09B5/00; C09B5/62; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09D7/00; C09D7/40; C09D7/41
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A perylene-3, 4, 9, 10-tetracarboxylic diimide of the formula (I) ##STR6## in which R is a 3- or 4-methoxybenzyl radical or mixtures of 3-methoxybenzyl and 4-methoxybenzyl radicals.
Claim 2
Dependent Claim
27 words
A perylene-3, 4, 9, 10-tetracarboxylic diimide of the formula (I) ##STR6## in which R is a 3- or 4-methoxybenzyl radical or mixtures of 3-methoxybenzyl and 4-methoxybenzyl radicals.
Claim 3
Dependent Claim
17 words
The perylene-3, 4, 9, 10-tetracarboxylic diimide as claimed in claim 1, wherein R is a 3-methoxybenzyl radical.
Claim 4
Dependent Claim
17 words
The perylene-3, 4, 9, 10-tetracarboxylic diimide as claimed in claim 1, wherein R is a 4-methoxybenzyl radical.
Claim 5
Dependent Claim
21 words
The perylene-3, 4, 9, 10-tetracarboxylic diimide as claimed in claim 1, wherein R is a mixture of 3-methoxybenzyl and 4-methoxybenzyl radicals.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |