US4379934A
Expired / Lapsed
US
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Process for two-dimensionally concentrating light, and novel perylene-3,4,9,10-tetracarboxylic acid diimides
Assignee: BASF SE
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Filing: 1980-12-08
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Granted: 1983-04-12
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Expires: 2000-12-08
Abstract
Abstract A process for concentrating light by means of fluorescent compounds of the formula <IMAGE> (I) where the R1's independently of one another are ortho-substituted aromatic or heterocyclic radicals which do not contain groups which confer solubility in water, and novel perylene-3,4,9,10-tetracarboxylic acid diimides of the formula I, where R1 is <IMAGE> A1 and A2 being hydrogen, or one of A1 or A2 being isopropyl and the other being hydrogen. The compounds I are very lightfast and convert incident light into fluorescent light with high efficiency.
Inventors
- 👤 Fritz Graser
- 👤 Guenther Seybold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:08
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/40; H10F77/42; H10F77/45; C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C08L; C08L67/00; C08L69/00; C09; C09B; C09B5/00; C09B5/62; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/12; C09K; C09K11/00; C09K11/06; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A perylene-3,4,9,10-tetracarboxylic acid diimide dye of the formula ##STR50## where A 1 and A 2 are hydrogen or A 1 is isopropyl and A 2 is hydrogen or A 2 is isopropyl and A 1 is hydrogen.
Claim 2
Dependent Claim
37 words
A perylene-3,4,9,10-tetracarboxylic acid diimide dye of the formula ##STR50## where A 1 and A 2 are hydrogen or A 1 is isopropyl and A 2 is hydrogen or A 2 is isopropyl and A 1 is hydrogen.
Claim 3
Dependent Claim
15 words
A dye as claimed in claim 1, wherein A 1 or A 2 is isopropyl.
Claim 4
Dependent Claim
12 words
A dye as claimed in claim 1, wherein A 1 is isopropyl.
References Cited (Backward Citations)
GB852202A
Cited
FR78658E
Cited
BE656105A
Cited
FR2148510B3
Cited
FR2153350B3
Cited
DE2210170A1
Cited
CH562852A5
Cited
DE2525630A1
Cited
US4110123A
Cited
GB2019026B
Cited
DE2851513A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |