Patent US4618694A successfully refreshed from Google Patents.
US4618694A
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Perylene compounds
Assignee: BASF SE
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Filing: 1985-01-11
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Granted: 1986-10-21
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Expires: 2005-01-11
Abstract
Abstract The present invention relates to a method for concentrating light by means of fluorescent compounds in plastic sheets or films, wherein perylene compounds are used for this purpose.
Inventors
- 👤 Rudiger Iden
- 👤 Gunther Seybold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
C; C09; C09B; C09B3/00; C09B3/14; C09B3/18; H; H10; H10F; H10F77/00; H10F77/40; H10F77/42; H10F77/45; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A perylene compound of the formula ##STR6## where Y 5 is halogen or cyano, R 1 is hydrogen, straight-chain or branched C 1 -C 18 -alkyl or C 5 -C 18 -cycloalkyl-substituted C 1 - or C 2 -alkyl or is C 7 -C 18 -cycloalkyl, and the cycloalkyl radicals can contain from 1 to 4 rings, X 1 is chlorine or bromine and n is 0, 1 or 2.
Claim 2
Dependent Claim
70 words
A perylene compound of the formula ##STR6## where Y 5 is halogen or cyano, R 1 is hydrogen, straight-chain or branched C 1 -C 18 -alkyl or C 5 -C 18 -cycloalkyl-substituted C 1 - or C 2 -alkyl or is C 7 -C 18 -cycloalkyl, and the cycloalkyl radicals can contain from 1 to 4 rings, X 1 is chlorine or bromine and n is 0, 1 or 2.
Claim 3
Dependent Claim
16 words
A perylene compound as claimed in claim 1, wherein Y 5 is chlorine, bromine or cyano.
Claim 4
Dependent Claim
26 words
A perylene compound as claimed in claim 1, which is of the formula ##STR7## where R 2 is straight-chain or branched C 4 -C 18 -alkyl.
Claim 5
Dependent Claim
23 words
A perylene compound as claimed in claim 1, wherein, in the formula, R 1 is n-butyl, isobutyl, neopentyl, 2-ethylhexyl, n-octyl, n-tridecyl or octadecyl.
Claim 6
Dependent Claim
23 words
A perylene compound as claimed in claim 2, wherein, in the formula, R 1 is n-butyl, isobutyl, neopentyl, 2-ethylhexyl, n-octyl, n-tridecyl or octadecyl.
Claim 7
Dependent Claim
20 words
A perylene compound as claimed in claim 3, wherein R 2 is n-butyl, isobutyl, neopentyl, 2-ethylhexyl, n-octyl, n-tridecyl or octadecyl.
References Cited (Backward Citations)
GB254310A
Cited
US3557218A
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DE2512516A1
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US4110123A
Cited
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US4379934A
Cited
US4492648A
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |