US3842084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-(dimethyl-meta-sulfonamidophenyl)-imides of perylenes
Assignee: BASF SE
•
Filing: 1972-09-05
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Granted: 1974-10-15
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Expires: 1992-09-05
Abstract
Abstract 1. THE PERYLENE-3, 4, 9, 10-TETRACARBOXYLIC DIIMIDE DYE OF THE FORMULA: 1,3,8,10-TETRA(O=),2,9-DI((H3C)2-O2S-(4-(H3C-)-1,3- PHENYLENE)-)-1,2,8,9-TETRAHYDRO-ANTHRA(2,1,9-DEF: 6,5,10-D''E''F'')-DIISOQUINOLINE
Inventors
- 👤 F Graser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:47
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PERYLENE-3, 4, 9, 10-TETRACARBOXYLIC DIIMIDE DYE OF THE FORMULA:
Claim 2
Dependent Claim
10 words
THE PERYLENE-3, 4, 9, 10-TETRACARBOXYLIC DIIMIDE DYE OF THE FORMULA:
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |