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Patent US5582774A successfully refreshed from Google Patents.
US5582774A
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Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
Assignee: Yamamoto Chemicals Inc
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Filing: 1991-02-26
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Granted: 1996-12-10
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Expires: 2011-02-26
Abstract
Abstract Near-infrared absorbers which contain phthalocyanine derivatives in which the four benzene rings contained in the molecule independently have 1 to 4 substituents are light and thermal resistant and possess high molar extinction coefficients. Such near-infrared absorbers are useful in optical recording media, near-infrared absorption filters, and liquid crystal display devices.
Inventors
- 👤 Hisato Itoh
- 👤 Katashi Enomoto
- 👤 Takahisa Oguchi
- 👤 Tsutomu Nishizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:06
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; C; C09; C09K; C09K19/00; C09K19/52; C09K19/60; C09B; C09B47/00; C09B47/04; C09B47/045; C09B47/06; C09B47/062; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/248; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
223 words
A near-infrared absorption filter comprising a phthalocyanine derivative of the formula (I) ##STR11## wherein R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 independently are alkyl, arylmethyl, alkoxymethyl, alkylthiomethyl, alkylaminomethyl, dialkylaminomethyl, aryloxymethyl, arylthiomethyl, arylaminomethyl, diarylaminomethyl or alkylarylaminomethyl, wherein the total number of carbon, oxygen, nitrogen and sulfur atoms present in each of R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 is in the range of 5 to 12; R 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 independently are hydrogen, alkyl, arylmethyl, alkoxymethyl, alkylthiomethyl, alkylaminomethyl, dialkylaminomethyl, aryloxymethyl, arylthiomethyl, arylaminomethyl, diarylaminomethyl, alkylarylaminomethyl, alkylthio, arylthio, alkoxy, aryloxy or aryl, but all of R 2 , R 3 , R 6 , R 7 , R 10 , R ll , R 14 and R 15 are not hydrogen when all of R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 are aryloxymethyl or alkyl; and Met is two hydrogen atoms, a divalent metal atom, a monosubstituted trivalent metal atom, a disubstituted tetravalent metal atom or an oxymetal group.
Claim 2
Dependent Claim
223 words
A near-infrared absorption filter comprising a phthalocyanine derivative of the formula (I) ##STR11## wherein R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 independently are alkyl, arylmethyl, alkoxymethyl, alkylthiomethyl, alkylaminomethyl, dialkylaminomethyl, aryloxymethyl, arylthiomethyl, arylaminomethyl, diarylaminomethyl or alkylarylaminomethyl, wherein the total number of carbon, oxygen, nitrogen and sulfur atoms present in each of R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 is in the range of 5 to 12; R 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 independently are hydrogen, alkyl, arylmethyl, alkoxymethyl, alkylthiomethyl, alkylaminomethyl, dialkylaminomethyl, aryloxymethyl, arylthiomethyl, arylaminomethyl, diarylaminomethyl, alkylarylaminomethyl, alkylthio, arylthio, alkoxy, aryloxy or aryl, but all of R 2 , R 3 , R 6 , R 7 , R 10 , R ll , R 14 and R 15 are not hydrogen when all of R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 are aryloxymethyl or alkyl; and Met is two hydrogen atoms, a divalent metal atom, a monosubstituted trivalent metal atom, a disubstituted tetravalent metal atom or an oxymetal group.
Claim 3
Dependent Claim
45 words
The near-infrared absorption filter of claim 1, wherein R 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 independently are alkyl, arylmethyl, alkoxymethyl, alkylthiomethyl, alkylaminomethyl, dialkylaminomethyl, aryloxymethyl, arylthiomethyl, arylaminomethyl, diarylaminomethyl or alkylarylaminomethyl.
Claim 4
Dependent Claim
42 words
The filter of claim 1, wherein R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 , and R 16 independently are alkyl or arylmethyl groups having 5 to 12 carbon atoms.
Claim 5
Dependent Claim
43 words
The near-infrared absorption filter of claim 3, wherein R 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 independently are alkyl or arylmethyl groups having 5 to 12 carbon atoms.
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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) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |